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Fundamental and Computational Sciences Directorate

Staff information

Libor Kovarik

Materials Scientist
Pacific Northwest National Laboratory
PO Box 999
MSIN: J7-10
Richland, WA 99352

PNNL Publications


  • Jang S., D. Oh, H. Kim, K. Kim, K. Khivantsev, L. Kovarik, and J. Kwak. 2024. "Controlling the Phase Transformation of Alumina for Enhanced Stability and Catalytic Properties." Angewandte Chemie International Edition. PNNL-SA-194943. doi:10.1002/anie.202400270
  • Jiang W., L. Kovarik, M.G. Wirth, Z. Hu, L. Shao, A.M. Casella, and D.J. Senor. 2024. "Microstructural and compositional evolutions in gamma-LiAlO2 pellets during ion irradiation at an elevated temperature." Journal of Nuclear Materials 591. PNNL-SA-189223. doi:10.1016/j.jnucmat.2024.154925


  • Chang J., G. Wang, X. Chang, Z. Yang, H. Wang, B. Li, and W. Zhang, et al. 2023. "Interface Synergism and Engineering of Pd/Co@N-C for Direct Ethanol Fuel Cells." Nature Communications 14. PNNL-SA-154109. doi:10.1038/s41467-023-37011-z
  • Chen L., S.I. Allec, M. Nguyen, L. Kovarik, A.S. Hoffman, J. Hong, and D. Meira, et al. 2023. "Dynamic Evolution of Palladium Single Atoms on Anatase Titania Support Determines the Reverse Water-Gas Shift Activity." Journal of the American Chemical Society 145, no. 19:10847-10860. PNNL-SA-184358. doi:10.1021/jacs.3c02326
  • Dagle V., G.B. Collinge, M. Rahman, A.D. Winkelman, W. Hu, J.Z. Hu, and L. Kovarik, et al. 2023. "Single-step conversion of ethanol into n-butene-rich olefins over metal catalysts supported on ZrO2-SiO2 mixed oxides." Applied Catalysis B: Environmental 331. PNNL-SA-181402. doi:10.1016/j.apcatb.2023.122707
  • Engel M., V. Noel, S. Pierce, L. Kovarik, R.K. Kukkadapu, J.S. Lezama Pacheco, and O. Qafoku, et al. 2023. "Structure and composition of natural ferrihydrite nano-colloids in anoxic groundwater." Water Research 238. PNNL-SA-181172. doi:10.1016/j.watres.2023.119990
  • Jiang W., L. Kovarik, K. Kruska, Y. Fu, Z. Hu, L. Shao, and W. Setyawan. 2023. "Behavior and properties of helium cavities in ductile-phase-toughened tungsten irradiated with He+ ions at an elevated temperature." Materialia 29. PNNL-SA-182610. doi:10.1016/j.mtla.2023.101789
  • Jiang W., L. Kovarik, M.G. Wirth, Z. Zhu, N.L. Canfield, L.M. Seymour, and L.M. Bagaasen, et al. 2023. "Ion irradiation study of lithium silicates for fusion blanket applications." Journal of Nuclear Materials 576. PNNL-SA-177177. doi:10.1016/j.jnucmat.2023.154281
  • Khivantsev K., N.R. Jaegers, H.A. Aleksandrov, I. Song, X. Pereira Hernandez, M.H. Engelhard, and J. Tian, et al. 2023. "Single Ru(II) ions on ceria as a highly active catalyst for abatement of NO." Journal of the American Chemical Society 145, no. 9:5029-5040. PNNL-SA-181740. doi:10.1021/jacs.2c09873
  • Kuang W., B.W. Arey, A. Dohnalkova, L. Kovarik, B. Mills, N.C. Menon, and R.J. Seffens, et al. 2023. "Multi-Scale Imaging of High-Pressure Hydrogen induced Damage in EPDM Rubber Using X-ray Microcomputed Tomography, Helium-Ion Microscopy and Transmission Electron Microscopy." International Journal of Hydrogen Energy 48, no. 23:8573-8587. PNNL-SA-177303. doi:10.1016/j.ijhydene.2022.12.004
  • Liu L., M. Sassi, X. Zhang, E. Nakouzi, L. Kovarik, S. Xue, and B. Jin, et al. 2023. "Understanding the mechanisms of anisotropic dissolution in metal oxides by applying radiolysis simulations to liquid-phase TEM." Proceedings of the National Academy of Sciences (PNAS) 120, no. 23:Art. No. e2101243120. PNNL-SA-180523. doi:10.1073/pnas.2101243120
  • Liu L., P. Chen, X. Zhang, L. Kovarik, J.J. De Yoreo, J. Liu, and M.L. Sushko. 2023. "Solution synthesis of two-dimensional zinc oxide (ZnO)/molybdenum disulfide (MoS2) heterostructure through reactive templating for enhanced visible-light degradation of rhodamine B." Advanced Composites and Hybrid Materials 6, no. 6:Art. No. 223. PNNL-SA-187731. doi:10.1007/s42114-023-00780-8
  • Mathai S., D.P. Veghte, L. Kovarik, C. Mazzoleni, K. Tseng, S. Bucci, and T. Capek, et al. 2023. "Optical Properties of Individual Tar Balls in the Free Troposphere." Environmental Science & Technology 57, no. 44:16834-16842. PNNL-SA-185434. doi:10.1021/acs.est.3c03498
  • Matthews B.E., J.J. Neeway, L. Nava-Farias, J. Marcial, B.W. Arey, J.A. Soltis, and L. Kovarik, et al. 2023. "Micro- and Nanoscale Surface Analysis of Late Iron Age Glass from Broborg, a Vitrified Swedish Hillfort." Microscopy and Microanalysis 29, no. 1:50-68. PNNL-SA-163973. doi:10.1093/micmic/ozac032
  • Mergelsberg S.T., B.P. Rajan, B.A. Legg, L. Kovarik, S.D. Burton, G.M. Bowers, and M.E. Bowden, et al. 2023. "Nanoscale Mg-Depleted Layers Slow Carbonation of Forsterite (Mg2SiO4) When Water Is Limited." Environmental Science & Technology Letters 10, no. 1:98-104. PNNL-SA-178504. doi:10.1021/acs.estlett.2c00866
  • Zambare N.M., B.W. Arey, O. Qafoku, K. Koirala, L. Kovarik, and A. Dohnalkova. 2023. "Novel Focused Ion Beam Liftouts for Spatial Characterization of Spherical Biominerals With Transmission Electron Microscopy." Microscopy and Microanalysis 29, no. 4:1467-1773. PNNL-SA-177391. doi:10.1093/micmic/ozad031


  • Chen L., L. Meyer, L. Kovarik, D. Meira, X. Pereira Hernandez, H. Shi, and K. Khivantsev, et al. 2022. "Disordered, Sub-Nanometer Ru Structures on CeO2 are Highly Efficient and Selective Catalysts in Polymer Upcycling by Hydrogenolysis." ACS Catalysis 12, no. 8:4618-4627. PNNL-SA-170085. doi:10.1021/acscatal.2c00684
  • Cokic I., S. Fai Chan, X. Guan, A.R. Nair, H. Yang, T. Liu, and Y. Chen, et al. 2022. "Intramyocardial Hemorrhage Drives Fatty Degeneration of Infarcted Myocardium." Nature Communications 13. PNNL-SA-181072. doi:10.1038/s41467-022-33776-x
  • Devaraj A., D.J. Barton, C. Li, S.M. Lambeets, T. Liu, A. Battu, and V. Shutthanandan, et al. 2022. "Visualizing the Nanoscale Oxygen and Cation Transport Mechanisms During the Early Stages of Oxidation of Fe-Cr-Ni Alloy Using In Situ Atom Probe Tomography." Advanced Materials Interfaces 9, no. 20:Art. No. 2200134. PNNL-SA-169147. doi:10.1002/admi.202200134
  • Dohnalkova A., M.M. Tfaily, R.K. Chu, P. Smith, C.J. Brislawn, T. Varga, and A.R. Crump, et al. 2022. "Effects of Microbial-Mineral Interactions on Organic Carbon Stabilization in a Ponderosa Pine Root Zone: A Micro-scale Approach." Frontiers in Earth Science 10. PNNL-SA-167716. doi:10.3389/feart.2022.799694
  • Gregory D.D., L. Kovarik, S.D. Taylor, D.E. Perea, J. Owens, N.M. Atienza, and T.W. Lyons. 2022. "Nanoscale trace-element zoning in pyrite framboids and implications for paleoproxy applications." Geology 50, no. 6:736-740. PNNL-SA-164752. doi:10.1130/G49890.1
  • Hubbard L.R., E.S. Fuller, J.R. Allred, G.J. Sevigny, L. Kovarik, B.E. Matthews, and C.C. Cowles, et al. 2022. "Accelerated Beta Radiation Aging of Interlayer Titanium Nitride in Gallium Nitride Contacts." MRS Communications 12, no. 1:24-29. PNNL-SA-163618. doi:10.1557/s43579-021-00092-2
  • Jiang W., L. Kovarik, Z. Zhu, T. Varga, M.E. Bowden, B.E. Matthews, and Z. Hu, et al. 2022. "Microstructural evolution and precipitation in gamma-LiAlO2 during ion irradiation." Journal of Applied Physics 131, no. 21:Art. No. 215902. PNNL-SA-170674. doi:10.1063/5.0089865
  • Khivantsev K., N.R. Jaegers, L. Kovarik, M.A. Derewinski, J. Kwak, and J. Szanyi. 2022. "On the Nature of Extra-Framework Aluminum Species and Improved Catalytic Properties in Steamed Zeolites." Molecules 27, no. 7:Art. No. 2352. PNNL-SA-174113. doi:10.3390/molecules27072352
  • Khivantsev K., X. Wei, L. Kovarik, N.R. Jaegers, E.D. Walter, P. Tran, and Y. Wang, et al. 2022. "Palladium/Ferrierite versus Palladium/SSZ-13 Passive NOx Adsorbers: Adsorbate-Controlled Location of Atomically Dispersed Palladium(II) in Ferrierite Determines High Activity and Stability." Angewandte Chemie International Edition 61, no. 3:e202107554. PNNL-SA-170151. doi:10.1002/anie.202107554
  • Lin F., K. Rappe, L. Kovarik, M. Song, X.S. Li, M.H. Engelhard, and Y. Wang. 2022. "Effects of high-temperature CeO2 calcination on the activity of Pt/CeO2 catalysts for oxidation of unburned hydrocarbon fuels." Catalysis Science & Technology 12, no. 8:2462-2470. PNNL-SA-169750. doi:10.1039/d2cy00030j
  • Lybrand R.A., O. Qafoku, M.E. Bowden, M.F. Hochella, L. Kovarik, D.E. Perea, and N. Qafoku, et al. 2022. "Fungal hyphae develop where titanomagnetite inclusions reach the surface of basalt grains." Scientific Reports 12. PNNL-SA-163525. doi:10.1038/s41598-021-04157-z
  • Schindler M., M.J. Schreckenbach, M.G. Wirth, O. Qafoku, L. Kovarik, and D.E. Perea. 2022. "Deciphering the Distribution and Crystal-Chemical Environment of Arsenic, Lead, Silica, Phosphorous, Tin and Zinc in a Porous Ferrihydrite Grain using Transmission Electron Microscopy and Atom Probe Tomography." ACS Earth and Space Chemistry 6, no. 3:558-570. PNNL-SA-168344. doi:10.1021/acsearthspacechem.1c00374
  • Taylor S.D., D.D. Gregory, D.E. Perea, L. Kovarik, J.B. Cliff, and T.W. Lyons. 2022. "Pushing the limits: Resolving paleoseawater signatures in nanoscale fluid inclusions by atom probe tomography." Earth and Planetary Science Letters 599. PNNL-SA-172856. doi:10.1016/j.epsl.2022.117859
  • Winkelman A.D., V. Dagle, T.L. Lemmon, L. Kovarik, Y. Wang, and R.A. Dagle. 2022. "Effect of Alkali Metal Addition on Catalytic Performance of Ag/ZrO2/SBA-16 Catalyst for Single-Step Conversion of Ethanol to Butadiene." Catalysis Science & Technology 13, no. 4:975-983. PNNL-SA-180968. doi:10.1039/d2cy01722a
  • Yu Y., H.Y. Sintim, A.F. Astner, D.G. Hayes, A.I. Bary, A. Zelenyuk-Imre, and O. Qafoku, et al. 2022. "Enhanced Transport of TiO2 in Unsaturated Sand and Soil after Release from Biodegradable Plastic during Composting." Environmental Science & Technology 56, no. 4:2398-2406. PNNL-SA-167956. doi:10.1021/acs.est.1c07169


  • Chen L., L. Kovarik, and J. Szanyi. 2021. "Temperature-Dependent Communication between Pt/Al2O3 Catalysts and Anatase TiO2 Dilutant: The Effects of Metal Migration and Carbon Transfer on the Reverse Water-Gas Shift Reaction." ACS Catalysis 11, no. 19:12058-12067. PNNL-SA-163875. doi:10.1021/acscatal.1c03133
  • Cheng Z., N. Sharma, K. Tseng, L. Kovarik, and S. China. 2021. "Direct Observation and Assessment of Phase States of Ambient and Lab-generated Sub-micron Particles upon Humidification." RSC Advances 11, no. 25:15264-15272. PNNL-SA-158604. doi:10.1039/d1ra02530a
  • Cui Y., J. Zhuchen, B. Peng, L. Kovarik, A. Devaraj, Z. Li, and M. Tao, et al. 2021. "Onset of high methane combustion rates over supported palladium catalysts: from isolated Pd cations to PdO nanoparticles." JACS Au 1, no. 4:369-408. PNNL-SA-153415. doi:10.1021/jacsau.0c00109
  • Dong Z., G. Deblonde, A. Middleton, D. Hu, A. Dohnalkova, L. Kovarik, and O. Qafoku, et al. 2021. "Microbe-Encapsulated Silica Gel Biosorbents for Selective Extraction of Scandium from Coal Byproducts." Environmental Science & Technology 55, no. 9:6320-6328. PNNL-SA-161032. doi:10.1021/acs.est.0c08632
  • Guo M.F., M.J. Gray, H.M. Job, C.A. Alvarez-Vasco, S. Subramaniam, X. Zhang, and L. Kovarik, et al. 2021. "Uncovering the Active Sites and Demonstrating Stable Catalyst for Cost-Effective Conversion of Ethanol to 1-Butanol." Green Chemistry 23, no. 20:8030-8039. PNNL-SA-164007. doi:10.1039/D1GC01979A
  • Khivantsev K., C. Garcia Vargas, J. Tian, L. Kovarik, N.R. Jaegers, J. Szanyi, and Y. Wang. 2021. "Economizing on Precious Metals in Three-Way Catalysts: Thermally Stable and Highly Active Single-Atom Rhodium on Cera for NO Abatement under Dry and Industrially Relevant Conditions." Angewandte Chemie International Edition 60, no. 1:391-398. PNNL-SA-157428. doi:10.1002/anie.202010815
  • Khivantsev K., N.R. Jaegers, H.A. Aleksandrov, L. Kovarik, M.A. Derewinski, Y. Wang, and G. Vayssilov, et al. 2021. "Biomimetic CO oxidation below-100 °C by a nitrate-containing metal-free microporous system." Nature Communications 12. PNNL-SA-192740. doi:10.1038/s41467-021-26157-3
  • Khivantsev K., N.R. Jaegers, J. Kwak, J. Szanyi, and L. Kovarik. 2021. "Precise identification and characterization of catalytically active sites on the surface of ?-alumina." Angewandte Chemie International Edition 60, no. 32:17522-17530. PNNL-SA-162118. doi:10.1002/anie.202102106
  • Khivantsev K., N.R. Jaegers, L. Kovarik, M. Wang, J.Z. Hu, Y. Wang, and M.A. Derewinski, et al. 2021. "The Superior Hydrothermal Stability of Pd/SSZ-39 in Low Temperature Passive NOx Adsorption (PNA) and Methane Combustion." Applied Catalysis B: Environmental 280. PNNL-SA-151139. doi:10.1016/j.apcatb.2020.119449
  • Kovarik L., M.E. Bowden, and J. Szanyi. 2021. "High temperature transition aluminas in d-Al2O3/?-Al2O3 stability range: Review." Journal of Catalysis 393. PNNL-SA-153915. doi:10.1016/j.jcat.2020.10.009
  • Li W., M.G. Taylor, D. Bayerl, S. Mozaffari, M. Dixit, S. Ivanov, and S. Seifert, et al. 2021. "Solvent Manipulation of the Pre-reduction Metal-Ligand Complex and Particle-Ligand Binding for Controlled Synthesis of Pd Nanoparticles." Nanoscale 13, no. 1:206-217. PNNL-SA-158241. doi:10.1039/D0NR06078J
  • Lin F., V. Dagle, A.D. Winkelman, M.H. Engelhard, L. Kovarik, Y. Wang, and Y. Wang, et al. 2021. "Understanding the Deactivation of Ag-ZrO2/SiO2 Catalysts for the Single-Step Conversion of Ethanol to Butenes." ChemCatChem 13, no. 3:999-1008. PNNL-SA-158105. doi:10.1002/cctc.202001488
  • Spurgeon S.R., C. Ophus, L. Jones, A.K. Petford-Long, S.V. Kalinin, M.J. Olszta, and R. Dunin-Borkowski, et al. 2021. "Towards Data-Driven Next-Generation Transmission Electron Microscopy." Nature Materials 20. PNNL-SA-152427. doi:10.1038/s41563-020-00833-z
  • Townsend L., K. Morris, R. Harrison, B. Schacherl, T. Vitova, L. Kovarik, and C.I. Pearce, et al. 2021. "Sulfidation of magnetite with incorporated uranium." Chemosphere 276. PNNL-SA-160714. doi:10.1016/j.chemosphere.2021.130117
  • Wang I., R.A. Dagle, T.S. Khan, J.A. Lopez-Ruiz, L. Kovarik, Y. Jiang, and M. Xu, et al. 2021. "Catalytic decomposition of methane into hydrogen and high-value carbons: combined experimental and DFT computational study." Catalysis Science & Technology 11, no. 14:4911-4921. PNNL-SA-163856. doi:10.1039/D1CY00287B
  • Weindl R., R. Khare, L. Kovarik, A. Jentys, K. Reuter, H. Shi, and J.A. Lercher. 2021. "Zeolite-stabilized di- and tetranuclear molybdenum sulfide clusters form stable catalytic hydrogenation sites." Angewandte Chemie International Edition 60, no. 17:9301-9305. PNNL-SA-160063. doi:10.1002/anie.202015769
  • Wu Y., F. Gao, H. Wang, L. Kovarik, B.J. Sudduth, and Y. Wang. 2021. "Probing acid-base properties of anatase TiO2 nanoparticles with dominant {001} and {101} facets using methanol chemisorption and surface reactions." Journal of Physical Chemistry C 125, no. 7:3988-4000. PNNL-SA-158674. doi:10.1021/acs.jpcc.0c11107
  • Xu M., J.A. Lopez-Ruiz, L. Kovarik, M.E. Bowden, S.D. Davidson, R.S. Weber, and I. Wang, et al. 2021. "Structure sensitivity and its effect on methane turnover and carbon co-product selectivity in thermocatalytic decomposition of methane over supported Ni catalysts." Applied Catalysis A: General 611. PNNL-SA-158733. doi:10.1016/j.apcata.2020.117967
  • Zhang X., Y. Lu, L. Kovarik, P. Dasari, D. Nagaki, and A.M. Karim. 2021. "Structure Sensitivity of n-Butane Hydrogenolysis on Supported Ir Catalysts." Journal of Catalysis 394. PNNL-SA-158239. doi:10.1016/j.jcat.2020.10.028
  • Zhu Y., S.F. Yuk, J. Zheng, M. Nguyen, M. Lee, J. Szanyi, and L. Kovarik, et al. 2021. "Environment of Metal-O-Fe Bonds Enabling High Activity in CO2 Reduction on Single Metal Atoms and on Supported Nanoparticles." Journal of the American Chemical Society 143, no. 14:5540-5549. PNNL-SA-160804. doi:10.1021/jacs.1c02276


  • Akhade S.A., A.D. Winkelman, V. Dagle, L. Kovarik, S.F. Yuk, M. Lee, and J. Zhang, et al. 2020. "Influence of Ag metal dispersion on the thermal conversion of ethanol to butadiene over Ag-ZrO2/SiO2 catalysts." Journal of Catalysis 386. PNNL-SA-143386. doi:10.1016/j.jcat.2020.03.030
  • Boiteau R.M., R.K. Kukkadapu, J.B. Cliff, C.R. Smallwood, L. Kovarik, M.G. Wirth, and M.H. Engelhard, et al. 2020. "Calcareous organic matter coatings sequester siderophores in alkaline soils." Science of the Total Environment 724. PNNL-SA-147851. doi:10.1016/j.scitotenv.2020.138250
  • Browning N.D., and L. Kovarik. 2020. Optimizing Sub-Sampled STEM Imaging for Beam Sensitive Materials and Dynamic Processes. PNNL-30428. Richland, WA: Pacific Northwest National Laboratory. Optimizing Sub-Sampled STEM Imaging for Beam Sensitive Materials and Dynamic Processes
  • Chatterjee S., M.S. Fujimoto, Y. Du, G.B. Hall, N. Lahiri, E.D. Walter, and L. Kovarik. 2020. "Redox-Based Electrochemical Affinity Sensor for Detection of Aqueous Pertechnetate Anion." ACS Sensors 5, no. 3:674-685. PNNL-SA-143890. doi:10.1021/acssensors.9b01531
  • Dagle V., A.D. Winkelman, N.R. Jaegers, J. Saavedra Lopez, J.Z. Hu, M.H. Engelhard, and S. Habas, et al. 2020. "Single-Step Conversion of Ethanol to n-Butene over Ag-ZrO2/SiO2 Catalysts." ACS Catalysis 10, no. 18:10602-10613. PNNL-SA-151691. doi:10.1021/acscatal.0c02235
  • Gallo A., J.L. Snider, D. Sokaras, D. Nordlund, T. Kroll, H. Ogasawara, and L. Kovarik, et al. 2020. "Ni5Ga3 Catalysts for CO2 Reduction to Methanol: Exploring the Role of Ga Surface Oxidation/reductions on Catalytic Activity." Applied Catalysis B: Environmental 267. PNNL-SA-146889. doi:10.1016/j.apcatb.2019.118369
  • Hubbard L.R., C.C. Cowles, A.W. Prichard, G.J. Sevigny, J.M. Johns, D. Calderin Morales, and L. Kovarik, et al. 2020. "GaN Nuclear Batteries: Radiation Modeling for Accelerated Contact Exposure of Betavoltaics." MRS Advances 5, no. 27-28:1483-1489. PNNL-SA-146878. doi:10.1557/adv.2020.6
  • Ilton E.S., L. Kovarik, E. Nakouzi, S.T. Mergelsberg, M.E. McBriarty, and E.J. Bylaska. 2020. "Using Atom Dynamics to Map the Defect Structure Around an Impurity in Nano-Hematite." The Journal of Physical Chemistry Letters 11, no. 24:10396-10400. PNNL-SA-153756. doi:10.1021/acs.jpclett.0c02798
  • Kautz E.J., B. Gwalani, S.M. Lambeets, L. Kovarik, D.K. Schreiber, D.E. Perea, and D.J. Senor, et al. 2020. "Rapid assessment of structural and compositional changes during early stages of zirconium alloy oxidation." npj Materials Degradation 4, no. 1:Article No. 29. PNNL-SA-150333. doi:10.1038/s41529-020-00133-6
  • Khivantsev K., N.R. Jaegers, I.Z. Koleva, H.A. Aleksandrov, L. Kovarik, M.H. Engelhard, and F. Gao, et al. 2020. "Stabilization of Super Electrophilic Pd+2 Cations in Small-Pore SSZ-13 Zeolite." Journal of Physical Chemistry C 124, no. 1:309-321. PNNL-SA-148282. doi:10.1021/acs.jpcc.9b06760
  • Khivantsev K., N.R. Jaegers, L. Kovarik, J.Z. Hu, F. Gao, Y. Wang, and J. Szanyi. 2020. "Palladium/Zeolite Low Temperature Passive NOx Adsorbers (PNA): Structure-Adsorption Property Relationships for Hydrothermally Aged PNA Materials." Emission Control Science and Technology 6. PNNL-SA-141069. doi:10.1007/s40825-019-00139-w
  • Kizovski T.V., M.M. Izawa, K. Tait-Sena, D. Moser, J.M. Day, B.C. Hyde, and L.F. White, et al. 2020. "Petrogenesis, alteration, and shock history of intermediate shergottite Northwest Africa 7042: Evidence for hydrous magmatism on Mars?." Geochimica et Cosmochimica Acta 283. PNNL-SA-152794. doi:10.1016/j.gca.2020.05.030
  • Kovarik L., M.E. Bowden, A. Andersen, N.R. Jaegers, N.M. Washton, and J. Szanyi. 2020. "Quantification of High-Temperature Transition Al2O3 and Their Phase Transformations." Angewandte Chemie International Edition 59, no. 48:21719-21727. PNNL-SA-153941. doi:10.1002/anie.202009520
  • lablokou V.S., S.A. Alekseev, S. Gryn, I. Bezverkhyy, V. Zaitsev, L. Kovarik, and V. de Bocarme, et al. 2020. "Superior Fischer-Tropsch Performance of Uniform Cobalt Nanoparticles Deposited into Mesoporous SiC." Journal of Catalysis 383. PNNL-SA-150647. doi:10.1016/j.jcat.2020.01.028
  • Li H., J. Pang, N.R. Jaegers, L. Kovarik, M.H. Engelhard, A.W. Savoy, and J.Z. Hu, et al. 2020. "Conversion of ethanol to 1,3-butadiene over Ag-ZrO2/SiO2 catalysts: The role of surface interfaces." Journal of Energy Chemistry 54. PNNL-SA-153728. doi:10.1016/j.jechem.2020.05.038
  • Lin F., Y. Chen, L. Zhang, D. Mei, L. Kovarik, B.J. Sudduth, and H. Wang, et al. 2020. "Single-Facet Dominant Anatase TiO2 (101) and (001) Model Catalysts to Elucidate the Active Sites for Alkanol Dehydration." ACS Catalysis 10, no. 7:4268-4279. PNNL-SA-150163. doi:10.1021/acscatal.9b04654
  • Pereira Hernandez X., A. DelaRiva, V. Muravev, D. Kunwar, H. Xiong, B.J. Sudduth, and M.H. Engelhard, et al. 2020. "Reply to: "Pitfalls in identifying active catalyst species"." Nature Communications 11. PNNL-SA-156008. doi:10.1038/s41467-020-18193-2
  • Qafoku O., L. Kovarik, M.E. Bowden, E. Nakouzi, A. Sheng, J. Liu, and C.I. Pearce, et al. 2020. "Nanoscale Observations of Fe(II)-Induced Ferrihydrite Transformation." Environmental Science Nano 7, no. 10:2953-2967. PNNL-SA-155340. doi:10.1039/D0EN00730G
  • Sabale S.R., D. Barpaga, J. Yao, L. Kovarik, Z. Zhu, S. Chatterjee, and B.P. McGrail, et al. 2020. "Understanding Time Dependence on Zinc Metal-Organic Framework Growth Using In Situ Liquid Secondary Ion Mass Spectrometry." ACS Applied Materials & Interfaces 12, no. 4:5090-5098. PNNL-SA-148177. doi:10.1021/acsami.9b19991
  • Sinnwell M.A., Q. Miller, L. Liu, J. Tao, M.E. Bowden, L. Kovarik, and D. Barpaga, et al. 2020. "Kinetics and Mechanisms of ZnO to ZIF-8 Transformations in Supercritical CO2 Revealed by in situ X-ray Diffraction." ChemSusChem 13, no. 10:2602-2612. PNNL-SA-149718. doi:10.1002/cssc.202000434
  • Subramaniam S., M.F. Guo, T. Bathena, M.J. Gray, X. Zhang, A.I. Martinez, and L. Kovarik, et al. 2020. "Direct Catalytic Conversion of Ethanol to C5+ Ketones: Role of Pd-Zn Alloy on Catalytic Activity and Stability." Angewandte Chemie International Edition 59, no. 34:14550-14557. PNNL-SA-148910. doi:10.1002/anie.202005256
  • Taylor S.E., C.I. Pearce, I. Chowdhury, L. Kovarik, I.I. Leavy, S.R. Baum, and A.I. Bary, et al. 2020. "Long-term Accumulation, Depth Distribution, and Speciation of Silver Nanoparticles in Biosolids-Amended Soils." Journal of Environmental Quality 49, no. 6:1679-1689. PNNL-SA-153952. doi:10.1002/jeq2.20156
  • Zhang J., J. Sun, L. Kovarik, M.H. Engelhard, L. Du, B. Sudduth, and H. Li, et al. 2020. "Surface Engineering of Earth-abundant Fe Catalysts for Selective Hydrodeoxygenation of Phenolics in Liquid Phase." Chemical Science 11, no. 23:5874-5880. PNNL-SA-149539. doi:10.1039/d0sc00983k
  • Zhang R., M. Athariboroujeny, G.B. Collinge, V. Iablokov, K.D. Shumilov, L. Kovarik, and A.N. Alexandrova, et al. 2020. "Promoting the cleavage of C-O bonds at the interface between a metal oxide cluster and a Co(0001) support." ACS Catalysis 10, no. 24:14722-14731. PNNL-SA-158240. doi:10.1021/acscatal.0c03205
  • Zhu Y., J. Zheng, J. Ye, Y. Cui, K. Koh, L. Kovarik, and D.M. Camaioni, et al. 2020. "Copper-zirconia interfaces in UiO-66 enable selective catalytic hydrogenation of CO2 to methanol." Nature Communications 11, no. 1:5849. PNNL-SA-149044. doi:10.1038/s41467-020-19438-w


  • Athariboroujeny M., A. Raub, V. Iablokov, S. Chenakin, L. Kovarik, and N.H. Kruse. 2019. "Competing Mechanisms in CO Hydrogenation over Co-MnOx Catalysts." ACS Catalysis 9, no. 6:5603-5612. PNNL-SA-145155. doi:10.1021/acscatal.9b00967
  • Bishop M.E., H. Dong, P. Glasser, B.R. Briggs, M. Pentrak, J.W. Stucki, and M.I. Boyanov, et al. 2019. "Reactivity of Redox Cycled Fe-bearing Subsurface Sediments Towards Hexavalent Chromium Reduction." Geochimica et Cosmochimica Acta 252. PNNL-SA-141702. doi:10.1016/j.gca.2019.02.039
  • Brewer B., A. Dohnalkova, V. Shutthanandan, L. Kovarik, E. Chang, A.M. Sawvel, and H.E. Mason, et al. 2019. "Microbe Encapsulation for Selective Rare-Earth Recovery from Electronic Waste Leachates." Environmental Science & Technology 53, no. 23:13888-13897. PNNL-SA-156048. doi:10.1021/acs.est.9b04608
  • Cui W., X. Zhang, C.I. Pearce, Y. Chen, S. Zhang, W. Liu, and M.H. Engelhard, et al. 2019. "Cr(III) adsorption by cluster formation on boehmite nanoplates in highly alkaline solution." Environmental Science & Technology 53, no. 18:11043-11055. PNNL-SA-143650. doi:10.1021/acs.est.9b02693
  • Dagle V., R.A. Dagle, L. Kovarik, F. Baddour, S. Habas, and R.T. Elander. 2019. "Single-step Conversion of Methyl Ethyl Ketone to Olefins over ZnxZryOz Catalysts in Water." ChemCatChem 11, no. 15:3393-3400. PNNL-SA-140968. doi:10.1002/cctc.201900292
  • Denk C., S.D. Foraita, L. Kovarik, K.A. Stoerzinger, Y. Liu, E. Barath, and J.A. Lercher. 2019. "Rate enhancement by Cu in NixCu1-x/ZrO2 bimetallic catalysts for hydrodeoxygenation of stearic acid." Catalysis Science & Technology 9, no. 10:2620-2629. PNNL-SA-140851. doi:10.1039/c9cy00181f
  • Devaraj A., W. Wang, V.R. Vemuri, L. Kovarik, X. Jiang, M.E. Bowden, and J.R. Trelewicz, et al. 2019. "Grain Boundary Segregation and Intermetallic Precipitation in Coarsening Resistant Nanocrystalline Aluminum Alloys." Acta Materialia 165. PNNL-SA-135423. doi:10.1016/j.actamat.2018.09.038
  • Dohnalkova A., S.L. Bell, M.L. Smith, L. Kovarik, M.E. Bowden, and K.S. Hofmockel. 2019. "Mineral-Organic Interface on Clay Minerals: Imaging and Analytical Approaches." Microscopy and Microanalysis 25, no. S2:2438-2439. PNNL-SA-148288. doi:10.1017/S1431927619012923
  • Jaegers N.R., K. Khivantsev, L. Kovarik, D.W. Klas, J.Z. Hu, Y. Wang, and J. Szanyi. 2019. "Catalytic activation of ethylene C-H bonds on uniform d8 Ir(I) and Ni(II) cations in zeolites: toward molecular level understanding of ethylene polymerization on heterogeneous catalysts." Catalysis Science & Technology 9, no. 23:6570-6576. PNNL-SA-148436. doi:10.1039/C9CY01442J
  • Khivantsev K., N.R. Jaegers, L. Kovarik, S. Prodinger, M.A. Derewinski, Y. Wang, and F. Gao, et al. 2019. "Palladium/Beta Zeolite Passive NOx Adsorbers (PNA): Clarification of PNA Chemistry and the Effects of CO and Zeolite Crystallite Size on PNA Performance." Applied Catalysis A: General 569. PNNL-SA-137831. doi:10.1016/j.apcata.2018.10.021
  • Kovarik L., A. Devaraj, C.A. Lavender, and V.V. Joshi. 2019. "Crystallographic and Compositional Analysis of impurity phase: U2MoSi2C in UMo Alloys." Journal of Nuclear Materials 519. PNNL-SA-140234. doi:10.1016/j.jnucmat.2019.03.044
  • Kovarik L., M.E. Bowden, D. Shi, J. Szanyi, and C.H. Peden. 2019. "Structural Intergrowth in delta-Al2O3." Journal of Physical Chemistry C 123, no. 14:9454-9460. PNNL-SA-138049. doi:10.1021/acs.jpcc.8b10135
  • Kunwar D., S. Zhou, A. DelaRiva, E.J. Peterson, H. Xiong, X.I. Pereira Hernandez, and S.C. Purdy, et al. 2019. "Stabilizing High Metal Loadings of Thermally Stable Platinum Single Atoms on an Industrial Catalyst Support." ACS Catalysis 9, no. 5:3978-3990. PNNL-SA-141231. doi:10.1021/acscatal.8b04885
  • Kuo C., Y. Lu, L. Kovarik, M.H. Engelhard, and A.M. Karim. 2019. "Structure Sensitivity of Acetylene Semi-Hydrogenation on Pt Single Atoms and Subnanometer Clusters." ACS Catalysis 9, no. 12:11030-11041. PNNL-SA-144951. doi:10.1021/acscatal.9b02840
  • Liu L., M.L. Sushko, E.C. Buck, X. Zhang, L. Kovarik, Z. Shen, and J. Tao, et al. 2019. "Revisiting the Growth Mechanism of Hierarchical Semiconductor Nanostructures: The Role of Secondary Nucleation in Branch Formation." The Journal of Physical Chemistry Letters 10, no. 21:6827-6834. PNNL-SA-147896. doi:10.1021/acs.jpclett.9b02110
  • Lu Y., C. Kuo, L. Kovarik, A.S. Hoffman, A. Boubnov, D.M. Driscoll, and J.R. Morris, et al. 2019. "A Versatile Approach for Quantification of Surface Site Fractions using Reaction Kinetics: The Case of CO Oxidation on Supported Ir Single Atoms and Nanoparticles." Journal of Catalysis 378. PNNL-SA-146617. doi:10.1016/j.jcat.2019.08.023
  • Lu Y., J. Wang, L. Yu, L. Kovarik, X. Zhang, A.S. Hoffman, and A. Gallo, et al. 2019. "Identification of the Active Complex for CO Oxidation Over Single-Atom Ir-on-MgAl2O4 Catalysts." Nature Catalysis 2, no. 2:149-156. PNNL-SA-138518. doi:10.1038/s41929-018-0192-4
  • Mehdi B.L., A. Stevens, L. Kovarik, N. Jiang, H.S. Mehta, A.V. Liyu, and S.M. Reehl, et al. 2019. "Controlling the Spatio-Temporal Dose Distribution During STEM Imaging by Subsampled Acquisition: In-Situ Observations of Kinetic Processes in Liquids." Applied Physics Letters 115, no. 6:Article Number 063102. PNNL-SA-145156. doi:10.1063/1.5096595
  • Mozaffari S., W. Li, M. Dixit, S. Seifert, B. Lee, L. Kovarik, and G. Mpourmpakis, et al. 2019. "The role of nanoparticle size and ligand coverage in size focusing of colloidal metal nanoparticles." Nanoscale Advances 1, no. 10:4052-4066. PNNL-SA-161898. doi:10.1039/c9na00348g
  • Murugesan V., M.J. Gray, M.F. Guo, H.M. Job, L. Kovarik, A. Devaraj, and S. Thevuthasan, et al. 2019. "Thermally Activated Nucleation and Growth of Cobalt and Nickel Oxide Nanoparticles on Porous Silica." Journal of Vacuum Science & Technology A: International Journal Devoted to Vacuum, Surfaces, and Films 37, no. 3:Article No. 031101. PNNL-SA-121414. doi:10.1116/1.5080448
  • Neill T.S., K. Morris, C. Pearce, L. Abrahamsen-Mills, L. Kovarik, S. Kellet, and B. Rigby, et al. 2019. "Silicate stabilisation of colloidal UO2 produced by uranium metal corrosion." Journal of Nuclear Materials 526. PNNL-SA-146561. doi:10.1016/j.jnucmat.2019.151751
  • Pereira Hernandez X.I., A. DelaRiva, V. Muravev, D. Kunwar, H. Xiong, B.J. Sudduth, and M.H. Engelhard, et al. 2019. "Tuning Pt/CeO2 Interactions By High-temperature Vapor-phase Synthesis For Improved Reducibility of Lattice Oxygen." Nature Communications 10, no. 1:Article number 1358. PNNL-SA-132985. doi:10.1038/s41467-019-09308-5
  • Reilly D.D., M.T. Athon, L. Kovarik, and T.G. Lach. 2019. "Characterization of Slag and Metal from Uranium Bomb Reduction: Morphology, Speciation, and the Search for Thorium." Materials Characterization 158. PNNL-SA-144324. doi:10.1016/j.matchar.2019.109948
  • Saavedra Lopez J., V. Dagle, C.A. Deshmane, L. Kovarik, R.S. Wegeng, and R.A. Dagle. 2019. "Methane and Ethane Steam Reforming over MgAl2O4-Supported Rh and Ir Catalysts: Catalytic Implications for Natural Gas Reforming Application." Catalysts 9, no. 10:Article No. 801. PNNL-SA-146376. doi:10.3390/catal9100801
  • Taylor S.D., J. Liu, X. Zhang, B.W. Arey, L. Kovarik, D.K. Schreiber, and D.E. Perea, et al. 2019. "Visualizing the iron atom exchange front in the Fe(II)-catalyzed recrystallization of goethite by atom probe tomography." Proceedings of the National Academy of Sciences (PNAS) 116, no. 8:2866-2874. PNNL-SA-138345. doi:10.1073/pnas.1816620116
  • Taylor S.D., L. Kovarik, J.B. Cliff, and K.M. Rosso. 2019. "Facet-Selective Adsorption of Fe(II) on Hematite Visualized by Nanoscale Secondary Ion Mass Spectrometry." Environmental Science Nano 6, no. 8:2429-2440. PNNL-SA-144858. doi:10.1039/C9EN00562E
  • Xiang Y., L. Kovarik, and N. Kruse. 2019. "Rate and selectivity hysteresis during the carbon monoxide hydrogenation over promoted Co/MnOx catalysts." Nature Communications 10, no. 1:Article No.3953. PNNL-SA-146618. doi:10.1038/s41467-019-11836-z
  • Zhang L., H. Dong, R.K. Kukkadapu, Q. Jin, and L. Kovarik. 2019. "Electron Transfer Between Sorbed Fe(II) and Structural Fe(III) in Smectites and its Effect on Nitrate-Dependent Iron Oxidation by Pseudogulbenkiania sp. strain 2002." Geochimica et Cosmochimica Acta 265. PNNL-SA-135173. doi:10.1016/j.gca.2019.08.042


  • Baylon R.A., J. Sun, L. Kovarik, M.H. Engelhard, H. Li, A.D. Winkelman, and K.J. Martin, et al. 2018. "Structural Identification of ZnxZryOz Catalysts for Cascade Aldolization and Self-Deoxygenation Reactions." Applied Catalysis B: Environmental 234. PNNL-SA-134337. doi:10.1016/j.apcatb.2018.04.051
  • Bhattarai A., K.T. Crampton, A.G. Joly, L. Kovarik, W.P. Hess, and P.Z. El-Khoury. 2018. "Imaging the Optical Fields of Functionalized Silver Nanowires through Molecular TERS." The Journal of Physical Chemistry Letters 9, no. 24:7105-1709. PNNL-SA-139471. doi:10.1021/acs.jpclett.8b03324
  • Dagle V., M.D. Flake, T.L. Lemmon, J. Saavedra Lopez, L. Kovarik, and R.A. Dagle. 2018. "Effect of the SiO2 Support on the Catalytic Performance of Ag/ZrO2/SiO2 Catalysts for the Single-Bed Production of Butadiene from Ethanol." Applied Catalysis B: Environmental 236. PNNL-SA-128543. doi:10.1016/j.apcatb.2018.05.055
  • Devaraj A., E.J. Kautz, L. Kovarik, S. Jana, N.R. Overman, C.A. Lavender, and V.V. Joshi. 2018. "Phase transformation of metastable discontinuous precipitation products to equilibrium phases in U10Mo alloys." Scripta Materialia 156. PNNL-SA-134393. doi:10.1016/j.scriptamat.2018.07.010
  • Devaraj A., L. Kovarik, E.J. Kautz, B.W. Arey, S. Jana, C.A. Lavender, and V.V. Joshi. 2018. "Grain Boundary Engineering to Control the Discontinuous Precipitation in Multicomponent U10Mo Alloy." Acta Materialia 151. PNNL-SA-129167. doi:10.1016/j.actamat.2018.03.039
  • Khivantsev K., F. Gao, L. Kovarik, Y. Wang, and J. Szanyi. 2018. "Molecular Level Understanding of How Oxygen and Carbon Monoxide Improve NOx Storage in Palladium/SSZ-13 Passive NOx Adsorbers: The Role of NO+ and Pd(II)(CO)(NO) Species." Journal of Physical Chemistry C 122, no. 20:10820-10827. PNNL-SA-131978. doi:10.1021/acs.jpcc.8b01007
  • Khivantsev K., N.R. Jaegers, L. Kovarik, J.c. Hanson, F. Tao, Y. Tang, and X. Zhang, et al. 2018. "Achieving Atomic Dispersion of Highly Loaded Transition Metals in Small-pore Zeolite SSZ-13: High-capacity and High-efficiency Low Temperature CO and Passive NOx Adsorbers." Angewandte Chemie International Edition 57, no. 51:16672-16677. PNNL-SA-136340. doi:10.1002/anie.201809343
  • Liu X., H. Dong, X. Yang, L. Kovarik, Y. Chen, and Q. Zeng. 2018. "Effects of Citrate on Hexavalent Chromium Reduction By Structural 1 Fe(II) in Nontronite." Journal of Hazardous Materials 343. PNNL-SA-127651. doi:10.1016/j.jhazmat.2017.09.038
  • Mozaffari S., W. Li, C.B. Thompson, S. Ivanov, S. Seifert, B. Lee, and L. Kovarik, et al. 2018. "Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles." Journal of Visualized Experiments (JoVE) 136. PNNL-SA-140505. doi:10.3791/57667
  • Okolie C., Y. Lyu, L. Kovarik, E. Stavitski, and C. Sievers. 2018. "Coupling of Methane to Ethane, Ethylene and Aromatics over Nickel on Ceria-Zirconia at Low Temperatures." ChemCatChem 10, no. 12:2700-2708. PNNL-SA-131737. doi:10.1002/cctc.201701892
  • Prange M.P., X. Zhang, E.S. Ilton, L. Kovarik, M.H. Engelhard, and S.N. Kerisit. 2018. "Electronic Response of Aluminum-Bearing Minerals." Journal of Chemical Physics 149, no. 2:024502. PNNL-SA-132258. doi:10.1063/1.5037104
  • Qafoku O., E.S. Ilton, M.E. Bowden, L. Kovarik, X. Zhang, R.K. Kukkadapu, and M.H. Engelhard, et al. 2018. "Synthesis of Nanometer-Sized Fayalite and Magnesium-Iron(II) Mixture Olivines." Journal of Colloid and Interface Science 515. PNNL-SA-131663. doi:10.1016/j.jcis.2018.01.036
  • Shi D., H. Wang, L. Kovarik, F. Gao, C. Wan, J.Z. Hu, and Y. Wang. 2018. "WOx supported on gamma-Al2O3 with different morphologies as model catalysts for alkanol dehydration." Journal of Catalysis 363. PNNL-SA-132764. doi:10.1016/j.jcat.2018.04.004
  • Stevens A.J., L. Luzi, H. Yang, L. Kovarik, B.L. Mehdi, A.V. Liyu, and M. Gehm, et al. 2018. "A Sub-Sampled Approach to Extremely Low-Dose STEM." Applied Physics Letters 112, no. 4:Article No. 043104. PNNL-SA-126577. doi:10.1063/1.5016192
  • Sutherland-Harper S., R. Taylor, J. Hobbs, S. Pimblott, R. Pattrick, M. Sarsfield, and M.A. Denecke, et al. 2018. "Surface speciation and interactions between adsorbed chloride and water on cerium dioxide." Journal of Solid State Chemistry 262. PNNL-SA-128945. doi:10.1016/j.jssc.2018.02.018
  • Varga T., T.C. Droubay, L. Kovarik, D. Hu, and S.A. Chambers. 2018. "Controlling the structure and ferroic properties of strained epitaxial NiTiO3 thin films on sapphire by post-deposition annealing." Thin Solid Films 662. PNNL-SA-129160. doi:10.1016/j.tsf.2018.07.030
  • Veghte D.P., S. China, J. Weis, P. Lin, M.L. Hinks, L. Kovarik, and S. Nizkorodov, et al. 2018. "Chemical Imaging and Heating-Induced Transformations of 1 Atmospheric Particles using Environmental Transmission Electron 2 Microscopy." Analytical Chemistry 90, no. 16:9761-9768. PNNL-SA-133708. doi:10.1021/acs.analchem.8b01410
  • Voss J., Y. Xiang, G.B. Collinge, D.E. Perea, L. Kovarik, J. McEwen, and N. Kruse. 2018. "Characterization of CoCu- and CoMn-based catalysts for the Fischer Tropsch reaction toward chain-lengthened oxygenates." Topics in Catalysis 61, no. 9-11:1016-1023. PNNL-SA-129636. doi:10.1007/s11244-018-0938-x
  • Zhang X., Y. He, J. Liu, M.E. Bowden, L. Kovarik, S.X. Mao, and C. Wang, et al. 2018. "Accessing crystal-crystal interaction forces with oriented nanocrystal atomic force microscopy probes." Nature Protocols 13, no. 9:2005-2030. PNNL-SA-131668. doi:10.1038/s41596-018-0027-4


  • Davidson S.D., K.A. Spies, D. Mei, L. Kovarik, I.V. Kutnyakov, X.S. Li, and V. Dagle, et al. 2017. "Steam Reforming of Acetic Acid over Co-supported Catalysts: Coupling Ketonization for Greater Stability." ACS Sustainable Chemistry & Engineering 5, no. 10:9136-9149. PNNL-SA-125545. doi:10.1021/acssuschemeng.7b02052
  • Dohnalkova A., B.W. Arey, T. Varga, M.D. Miller, and L. Kovarik. 2017. "Imaging and Analytical Approaches for Characterization of Soil Mineral Weathering." Microscopy and Microanalysis 23, no. S1:2172-2173. PNNL-SA-126363. doi:10.1017/S1431927617011527
  • Elsaidi S.K., M.A. Sinnwell, D. Banerjee, A. Devaraj, R.K. Kukkadapu, T.C. Droubay, and Z. Nie, et al. 2017. "Reduced Magnetism in Core-Shell Magnetite@MOF Composites." Nano Letters 17, no. 11:6968-6973. PNNL-SA-122221. doi:10.1021/acs.nanolett.7b03451
  • Jana S., A. Devaraj, L. Kovarik, B.W. Arey, L.E. Sweet, T. Varga, and C.A. Lavender, et al. 2017. "Kinetics of cellular transformation and competing precipitation mechanisms during sub-eutectoid annealing of U10Mo alloys." Journal of Alloys and Compounds 723. PNNL-SA-124502. doi:10.1016/j.jallcom.2017.06.292
  • Jiang W., J. Zhang, L. Kovarik, Z. Zhu, L. Price, J. Gigax, and E. Castanon, et al. 2017. "Irradiation effects and hydrogen behavior in H2+ and He+ implanted gamma-LiAlO2 single crystals." Journal of Nuclear Materials 484. PNNL-SA-114795. doi:10.1016/j.jnucmat.2016.03.014
  • Kovarik L., N.M. Washton, R.K. Kukkadapu, A. Devaraj, A. Wang, Y. Wang, and J. Szanyi, et al. 2017. "Transformation of active sites in Fe/SSZ-13 SCR catalysts during hydrothermal aging: a spectroscopic, microscopic and kinetics study." ACS Catalysis 7, no. 4:2458-2470. PNNL-SA-123026. doi:10.1021/acscatal.6b03679
  • Kruska K., A. Rohatgi, V.S. Vemuri, L. Kovarik, T.H. Moser, J.E. Evans, and N.D. Browning. 2017. "Grain growth in nanocrystalline Mg-Al thin films." Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science 48A, no. 12:6118-6125. PNNL-SA-113636. doi:10.1007/s11661-017-4350-0
  • Li W., L. Kovarik, Y. Cheng, L. Nie, M.E. Bowden, J. Liu, and Y. Wang. 2017. "Stabilization and Transformation of Pt Nanocrystals Supported on ZnAl2O4 Spinel." RSC Advances 7, no. 6:3282-3286. PNNL-SA-123052. doi:10.1039/C6RA26159K
  • Li W., L. Nie, Y. Chen, L. Kovarik, J. Liu, and Y. Wang. 2017. "Surface Enrichment of Pt in Stable Pt-Ir Nano-alloy Particles on MgAl2O4 Spinel in oxidizing atmosphere." Catalysis Communications 93. PNNL-SA-123418. doi:10.1016/j.catcom.2017.01.012
  • Mozaffari S., W. Li, C.B. Thompson, S. Ivanov, S. Siefert, B. Lee, and L. Kovarik, et al. 2017. "Colloidal nanoparticle size control: experimental and kinetic modeling investigation of the ligand-metal binding role in controlling the nucleation and growth kinetics." Nanoscale 9, no. 36:13772-13785. PNNL-SA-126850. doi:10.1039/c7nr04101b
  • Nie L., D. Mei, H. Xiong, B. Peng, Z. Ren, X.I. Pereira Hernandez, and A. DelaRiva, et al. 2017. "Activation of Surface Lattice Oxygen in Single-atom Pt/CeO2 for Low-temperature CO Oxidation." Science 358, no. 6369:1419-1423. PNNL-SA-126186. doi:10.1126/science.aao2109
  • Okolie C., Y.F. Belhseine, Y. Lyu, M. Yung, M.H. Engelhard, L. Kovarik, and E. Stavitski, et al. 2017. "Conversion of Methane into Methanol and Ethanol over Nickel Oxide on Ceria-Zirconia Catalysts in a Single Reactor." Angewandte Chemie International Edition 56, no. 44:13876-13881. PNNL-SA-123257. doi:10.1002/anie.201704704
  • Qafoku O., C.I. Pearce, A. Neumann, L. Kovarik, M. Zhu, E.S. Ilton, and M.E. Bowden, et al. 2017. "Tc(VII) and Cr(VI) Interaction with a Naturally Reduced Ferruginous Smectite from the Redox Transition Zone." Environmental Science & Technology 51, no. 16:9042-9052. PNNL-SA-127378. doi:10.1021/acs.est.7b02191
  • Romano C.A., M. Zhou, Y. Song, V.H. Wysocki, A. Dohnalkova, L. Kovarik, and L. Pasa Tolic, et al. 2017. "Biogenic manganese oxide nanoparticle formation by a multimeric multicopper oxidase Mnx." Nature Communications 8. PNNL-SA-124759. doi:10.1038/s41467-017-00896-8
  • Song J., Y. Wang, E.D. Walter, N.M. Washton, D. Mei, L. Kovarik, and M.H. Engelhard, et al. 2017. "Towards rational design of Cu/SSZ-13 selective catalytic reduction catalysts: Implications from atomic-level understanding of hydrothermal stability." ACS Catalysis 7, no. 12:8214-8227. PNNL-SA-128659. doi:10.1021/acscatal.7b03020
  • Varga T., T.C. Droubay, L. Kovarik, M.I. Nandasiri, V. Shutthanandan, D. Hu, and B. Kim, et al. 2017. "Coupled Lattice Polarization and Ferromagnetism in Multiferroic NiTiO3 Thin Films." ACS Applied Materials & Interfaces 9, no. 26:21879-21890. PNNL-SA-121771. doi:10.1021/acsami.7b04481
  • Veghte D.P., S. China, J. Weiss, L. Kovarik, M.K. Gilles, and A. Laskin. 2017. "Optical Properties of Airborne Soil Organic Particles." ACS Earth and Space Chemistry 1, no. 8:511-521. PNNL-SA-127009. doi:10.1021/acsearthspacechem.7b00071
  • Xiong H., S. Lin, J.G. Goetze, P. Pletcher, H. Guo, L. Kovarik, and K. Artyushkova, et al. 2017. "Thermally Stable and Regenerable Platinum-Tin Clusters for Propane Dehydrogenation Prepared by Atom Trapping on Ceria." Angewandte Chemie International Edition 56, no. 31:8986-8991. PNNL-SA-126830. doi:10.1002/anie.201701115
  • Xu M., S.L. Riechers, E.S. Ilton, Y. Du, L. Kovarik, T. Varga, and B.W. Arey, et al. 2017. "Manganese-Calcium Intermixing Facilitates Heteroepitaxial Growth at the (10-14) Calcite-Water Interface." Chemical Geology 470. PNNL-SA-125533. doi:10.1016/j.chemgeo.2017.09.001
  • Zheng Y., L. Kovarik, M.H. Engelhard, Y. Wang, Y. Wang, F. Gao, and J. Szanyi. 2017. "Low-Temperature Pd/Zeolite Passive NOx Adsorbers: Structure, Performance and Adsorption Chemistry." Journal of Physical Chemistry C 121, no. 29:15793-15803. PNNL-SA-125868. doi:10.1021/acs.jpcc.7b04312
  • Zhu Y., P.V. Sushko, D. Melzer, E. Jensen, L. Kovarik, C. Ophus, and M. Sanchez-Sanchez, et al. 2017. "Formation of Oxygen Radical Sites on MoVNbTeOx by Cooperative Electron Redistribution." Journal of the American Chemical Society 139, no. 36:12342-12345. PNNL-SA-129307. doi:10.1021/jacs.7b05240


  • Aguiar J.A., S. Wozny, N.R. Alkurd, M. Yang, L. Kovarik, T. Holesinger, and M.M. Al-Jassim, et al. 2016. "Effect of Water Vapor, Temperature, and Rapid Annealing on Formamidinium Lead Triiodide Perovskite Crystallization." ACS Energy Letters 1, no. 1:155-161. PNNL-SA-119094. doi:10.1021/acsenergylett.6b00042
  • China S., B. Wang, J. Weis, L.V. Rizzo, J. Brito, G. Cirino, and L. Kovarik, et al. 2016. "Rupturing of biological spores as a source of secondary particles in Amazonia." Environmental Science & Technology 50, no. 22:12179 - 12186. PNNL-SA-118675. doi:10.1021/acs.est.6b02896
  • Kali A., I. Cokic, R. Tang, A. Dohnalkova, L. Kovarik, H. Yang, and A. Kumar, et al. 2016. "Persistent Microvascular Obstruction After Myocardial Infarction Culminates in the Confluence of Ferric Iron Oxide Crystals, Proinflammatory Burden, and Adverse Remodeling." Circulation 9, no. 11:Article No. e004996. PNNL-SA-120886. doi:10.1161/CIRCIMAGING.115.004996
  • Kovarik L., A.J. Stevens, A.V. Liyu, and N.D. Browning. 2016. "Implementing an Accurate and Rapid Sparse Sampling Approach for Low-Dose Atomic Resolution STEM Imaging." Applied Physics Letters 109, no. 16:Article No. 164102. PNNL-SA-120342. doi:10.1063/1.4965720
  • Lao D., R.K. Kukkadapu, L. Kovarik, B.W. Arey, D.J. Heldebrant, and S.K. Nune. 2016. "Switchable Ionic Liquids: An Environmentally-friendly Medium to Synthesize Nanoparticulate Green Rust." Current Inorganic Chemistry 6, no. 2:92-99. PNNL-SA-110524. doi:10.2174/1877944106999160317160621
  • Lebarbier V.M., R.A. Dagle, L. Kovarik, A. Genc, Y. Wang, M.E. Bowden, and H. Wan, et al. 2016. "Steam Reforming of Hydrocarbons from Biomass-Derived Syngas over MgAl2O4-Supported Transition Metals and Bimetallic IrNi Catalysts." Applied Catalysis B: Environmental 184. PNNL-24262. doi:10.1016/j.apcatb.2015.11.022
  • Levitskaia T.G., S. Chatterjee, B.W. Arey, E.L. Campbell, Y. Hong, L. Kovarik, and J.M. Peterson, et al. 2016. "RedOx-Controlled Sorption of Iodine Anions by Hydrotalcite Composites." RSC Advances 6, no. 79:76042-76055. PNNL-SA-115759. doi:10.1039/c6ra13092e
  • Levitskaia T.G., S. Chatterjee, N. Pence, J. Romero, T. Varga, M.H. Engelhard, and Y. Du, et al. 2016. "Inorganic Tin Aluminophosphate Nanocomposite for Reductive Separation of Pertechnetate." Environmental Science: Nano 3, no. 2:1003-1013. PNNL-SA-116229. doi:10.1039/C6EN00130K
  • Muntifering B.R., L. Kovarik, N.D. Browning, R.C. Pond, W.B. Knowlton, and P. Mullner. 2016. "Stress assisted removal of conjugation boundaries in non-modulated Ni-Mn-Ga by coordinated secondary twinning." Journal of Materials Science 51, no. 1:457-466. PNNL-SA-109808. doi:10.1007/s10853-015-9236-1
  • Smith C.D., V.M. Lebarbier, M.D. Flake, K.K. Ramasamy, L. Kovarik, M.E. Bowden, and T. Onfroy, et al. 2016. "Conversion of Syngas-Derived C2+ Mixed Oxygenates to C3-C5 Olefins over ZnxZryOz Mixed Oxides Catalysts." Catalysis Today 6, no. 7:2325-2316. PNNL-SA-111860. doi:10.1039/C5CY01261A
  • Wang B., H.T. Harder, S.T. Kelly, D.Y. Piens, S. China, L. Kovarik, and M. Keiluweit, et al. 2016. "Airborne Soil Organic Particles Generated by Precipitation." Nature Geoscience 9, no. 6:433-438. PNNL-SA-110735. doi:10.1038/NGEO2705
  • Xing R., V.M. Lebarbier, M.D. Flake, L. Kovarik, K.O. Albrecht, C.A. Deshmane, and R.A. Dagle. 2016. "Steam Reforming of Fast Pyrolysis-Derived Aqueous Phase Oxygenates over Co, Ni, and Rh Metals Supported on MgAl2O4." Catalysis Today 269. PNNL-SA-111967. doi:10.1016/j.cattod.2015.11.046


  • Ewbank J.L., L. Kovarik, F.Z. Diallo, and C. Sievers. 2015. "Effect of Metal-Support Interactions in Ni/Al2O3 Catalysts with Low Metal Loading for Methane Dry Reforming." Applied Catalysis A: General 494. PNNL-SA-107720. doi:10.1016/j.apcata.2015.01.029
  • Felmy A.R., O. Qafoku, B.W. Arey, L. Kovarik, J. Liu, D.E. Perea, and E.S. Ilton. 2015. "Enhancing Magnesite Formation at Low Temperature and High CO2 Pressure: The Impact of Seed Crystals and Minor Components." Chemical Geology 395. PNNL-SA-107559. doi:10.1016/j.chemgeo.2014.12.003
  • Ilton E.S., T.C. Droubay, A.M. Chaka, L. Kovarik, T. Varga, B.W. Arey, and S.N. Kerisit. 2015. "Epitaxial single-crystal thin films of MnxTi1-xO2-d grown on (rutile)TiO2 substrates with pulsed laser deposition: Experiment and theory." Surface Science 632. PNNL-SA-102453. doi:10.1016/j.susc.2014.10.013
  • Jiang W., H. Jung, L. Kovarik, Z. Wang, T.J. Roosendaal, Z. Zhu, and D.J. Edwards, et al. 2015. "Magnesium behavior and structural defects in Mg+ ion implanted silicon carbide." Journal of Nuclear Materials 458. PNNL-SA-105877. doi:10.1016/j.jnucmat.2014.12.071
  • Jiang W., H. Jung, L. Kovarik, Z. Wang, T.J. Roosendaal, Z. Zhu, and D.J. Edwards, et al. 2015. "MAGNESIUM PRECIPITATION AND DIFUSSION IN Mg+ ION IMPLANTED SILICON CARBIDE." In FUSION MATERIALS SEMIANNUAL PROGRESS REPORT FOR THE PERIOD ENDING December 31, 2014, edited by PJ Pappano. 85-86. Oak Ridge, Tennessee:Oak Ridge National Laboratory. PNNL-SA-107486.
  • Karim A.M., N.M. Al Hasan, S.A. Ivanov, S. Siefert, R.T. Kelly, N.G. Hallfors, and A.D. Benavidez, et al. 2015. "Synthesis of 1 nm Pd Nanoparticles in a Microfluidic Reactor: Insights from in Situ X ray Absorption Fine Structure Spectroscopy and Small-Angle X ray Scattering." Journal of Physical Chemistry C 119, no. 23:13257-13267. PNNL-SA-100863. doi:10.1021/acs.jpcc.5b01681
  • Kovarik L., M.E. Bowden, D. Shi, N.M. Washton, A. Anderson, J.Z. Hu, and J. Lee, et al. 2015. "Unraveling the Origin of Structural Disorder in High Temperature Transition Al2O3: Structure of ?-Al2O3." Chemistry of Materials 27, no. 20:7042-7049. PNNL-SA-111174. doi:10.1021/acs.chemmater.5b02523
  • Li Y., Z. Wei, F. Gao, L. Kovarik, R.A. Baylon, C.H. Peden, and Y. Wang. 2015. "Effect of Oxygen Defects on the Catalytic Performance of VOx/CeO2 Catalysts for Oxidative Dehydrogenation of Methanol." ACS Catalysis 5, no. 5:3006-3012. PNNL-SA-110150. doi:10.1021/cs502084g
  • Perea D.E., I. Arslan, J. Liu, Z. Ristanovic, L. Kovarik, B.W. Arey, and J.A. Lercher, et al. 2015. "Determining the Location and Nearest Neighbors of Aluminum in Zeolites with Atom Probe Tomography." Nature Communications 6. PNNL-SA-106381. doi:10.1038/ncomms8589
  • Stevens A.J., L. Kovarik, P. Abellan, X. Yuan, L. Carin, and N.D. Browning. 2015. "TEM Video Compressive Sensing." Microscopy and Microanalysis 21, no. Suppl 3:1583-1584. PNNL-SA-108164.
  • Sun J., A.M. Karim, X.S. Li, J.E. Rainbolt, L. Kovarik, Y. Shin, and Y. Wang. 2015. "Hierarchically structured catalysts for cascade and selective steam reforming/hydrodeoxygenation reactions." Chemical Communications 51, no. 93:16617-16620. PNNL-SA-114345. doi:10.1039/C5CC07244A
  • Varga T., T.C. Droubay, M.E. Bowden, L. Kovarik, D. Hu, and S.A. Chambers. 2015. "Strain-dependence Of The Structure And Ferroic Properties Of Epitaxial NiTiO3 Thin Films Grown On Different Substrates." Advances in Condensed Matter Physics 2015. PNNL-SA-110090. doi:10.1155/2015/493045
  • Viswanathan G.B., R. Shi, A. Genc, V.A. Vorontsov, L. Kovarik, C.F. Rae, and M.J. Mills. 2015. "Segregation At Stacking Faults Within The ?' Phase Of Two Ni-base Superalloys Following Intermediate Temperature Creep." Scripta Materialia 94. PNNL-SA-105000. doi:10.1016/j.scriptamat.2014.06.032


  • Bhattacharya P., E.N. Nasybulin, M.H. Engelhard, L. Kovarik, M.E. Bowden, S. Li, and D.J. Gaspar, et al. 2014. "Dendrimer-Encapsulated Ruthenium Nanoparticles as Catalysts for Lithium-O2 Batteries." Advanced Functional Materials 24, no. 47:7510-7519. PNNL-SA-101221. doi:10.1002/adfm.201402701
  • Bishop M.E., P. Glasser, H. Dong, B.W. Arey, and L. Kovarik. 2014. "Reduction And Immobilization Of Hexavalent Chromium By Microbially Reduced Fe-bearing Clay Minerals." Geochimica et Cosmochimica Acta 133. PNNL-SA-101775. doi:10.1016/j.gca.2014.02.040
  • Ewbank J.L., L. Kovarik, C.C. Kenvin, and C. Sievers. 2014. "Effect Of Preparation Methods On The Performance Of Co/Al2O3 Catalysts For Dry Reforming Of Methane." Green Chemistry 16, no. 2:885-896. PNNL-SA-100857. doi:10.1039/c3gc41782d
  • Fan D., R. Anitori, B.M. Tebo, P.G. Tratnyek, J.S. Lezama Pacheco, R.K. Kukkadapu, and L. Kovarik, et al. 2014. "Oxidative Remobilization of Technetium Sequestered by Sulfide-Transformed Nano Zerovalent Iron." Environmental Science & Technology 48, no. 13:7409-7417. PNNL-SA-101920. doi:10.1021/es501607s
  • Jiang W., L. Kovarik, Z. Zhu, T. Varga, M.H. Engelhard, M.E. Bowden, and T.M. Nenoff, et al. 2014. "Microstructure and Cs Behavior of Ba-Doped Aluminosilicate Pollucite Irradiated with F+ Ions." Journal of Physical Chemistry C 118, no. 31:18160-18169. PNNL-SA-102552. doi:10.1021/jp5045223
  • Kovarik L., M.E. Bowden, A. Genc, J. Szanyi, C.H. Peden, and J. Kwak. 2014. "Structure of d-Alumina: Toward The Atomic Level Understanding Of Transition Alumina Phases." Journal of Physical Chemistry C 118. PNNL-SA-100238. doi:10.1021/jp500051j
  • Lebarbier V.M., R.A. Dagle, L. Kovarik, K.O. Albrecht, X.S. Li, L. Li, and C.E. Taylor, et al. 2014. "Sorption-Enhanced Synthetic Natural Gas (SNG) Production from Syngas: A Novel Process Combining CO Methanation, Water-Gas Shift, and CO2 Capture." Applied Catalysis. B, Environmental 144. PNNL-SA-90830. doi:10.1016/j.apcatb.2013.06.034
  • Li W., L. Kovarik, D. Mei, M.H. Engelhard, F. Gao, J. Liu, and Y. Wang, et al. 2014. "A general mechanism for stabilizing the small sizes of precious metal nanoparticles on oxide supports." Chemistry of Materials 26, no. 19:5475-5481. PNNL-SA-95940. doi:10.1021/cm5013203
  • Li Y., Z. Wei, F. Gao, L. Kovarik, C.H. Peden, and Y. Wang. 2014. "Effects of CeO2 Support Facets on VOx/CeO2 Catalysts in Oxidative Dehydrogenation of Methanol." Journal of Catalysis 315, no. 1:15-24. PNNL-SA-102214. doi:10.1016/j.jcat.2014.04.013
  • Mei D., V.A. Glezakou, V.M. Lebarbier, L. Kovarik, H. Wan, K.O. Albrecht, and M.A. Gerber, et al. 2014. "Highly Active and Stable MgAl2O4 Supported Rh and Ir Catalysts for Methane Steam Reforming: A Combined Experimental and Theoretical Study." Journal of Catalysis 316. PNNL-SA-99099. doi:10.1016/j.jcat.2014.04.021
  • Muntifering B.R., R.C. Pond, L. Kovarik, N.D. Browning, and P. Muller. 2014. "Intra-variant Substructure in Ni-Mn-Ga Martensite: Conjugation Boundaries." Acta Materialia 71. PNNL-SA-99492. doi:10.1016/j.actamat.2014.03.018
  • Xin H., S. Alayoglu, R. Tao, A. Genc, C.M. Wang, L. Kovarik, and E.A. Stach, et al. 2014. "Revealing the Atomic Restructuring of Pt-Co Nanoparticles." Nano Letters 14, no. 6:3203-3207. PNNL-SA-102970. doi:10.1021/nl500553a
  • Xu M., L. Kovarik, B.W. Arey, A.R. Felmy, K.M. Rosso, and S.N. Kerisit. 2014. "Kinetics and Mechanisms of Cadmium Carbonate Heteroepitaxial Growth at the Calcite (1014) Surface." Geochimica et Cosmochimica Acta 134. PNNL-SA-96079. doi:10.1016/j.gca.2013.11.036


  • Arey B.W., L. Kovarik, O. Qafoku, Z. Wang, N.J. Hess, and A.R. Felmy. 2013. "Identification of Fragile Microscopic Structures during Mineral Transformations in Wet Supercritical CO2." Microscopy and Microanalysis 19, no. 2:268-275. PNNL-SA-83815. doi:10.1017/S1431927612014171
  • Fan D., R. Anitori, B.M. Tebo, P.G. Tratnyek, J.S. Lezama Pacheco, R.K. Kukkadapu, and M.H. Engelhard, et al. 2013. "Reductive Sequestration Of Pertechnetate (99TcO4-) By Nano Zerovalent Iron (nZVI) Transformed By Abiotic Sulfide." Environmental Science & Technology 47, no. 10:5302-5310. PNNL-SA-92126. doi:10.1021/es304829z
  • Genc A., L. Kovarik, M. Gu, H. Cheng, P. Plachinda, L. Pullan, and B. Freitag, et al. 2013. "XEDS STEM Tomography For 3D Chemical Characterization Of Nanoscale Particles." Ultramicroscopy 131. PNNL-SA-94411. doi:10.1016/j.ultramic.2013.03.023
  • Jagielski J., P.A. Jozwik, I. Jozwik Biala, L. Kovarik, B.W. Arey, J. Gaca, and W. Jiang. 2013. "RBS/C, HRTEM and HRXRD study of damage accumulation in irradiated SrTiO3." Radiation Effects and Defects in Solids 168, no. 6:442-449. PNNL-SA-88792. doi:10.1080/10420150.2013.787796
  • Jiang W., L. Kovarik, and T.M. Nenoff. 2013. "Chemical and Charge Imbalance Induced by Radionuclide Decay: Effects on Waste Form Structure." In Separations and Waste Forms Research and Development FY 2013 Accomplishments Report. 122-127. Idaho Falls, Idaho:Idaho National Laboratory. PNNL-SA-99685.
  • Jozwik Biala I., J.K. Jagielski, B.W. Arey, L. Kovarik, G. Sattonay, A. Debelle, and S. Mylonas, et al. 2013. "Effect of combined local variations in elastic and inelastic energy losses on the morphology of tracks in ion-irradiated materials." Acta Materialia 61, no. 12:4669-4675. PNNL-SA-81738. doi:10.1016/j.actamat.2013.04.037
  • Jozwik P.A., N. Sathish, L. Nowicki, J. Jagielski, A.W. Turos, L. Kovarik, and B.W. Arey, et al. 2013. "Analysis of Crystal Lattice Deformation by Ion Channeling." Acta Physica Polonica. Series A: General Physics, Physics of Condensed Matter, Optics and Quantum Electronics, Atomic and Molecular Physics, Applied Physics 123, no. 5:828-830. PNNL-SA-97219. doi:10.12693/APhysPolA.123.828
  • Kovarik L., A. Genc, C.M. Wang, A. Qiu, C.H. Peden, J. Szanyi, and J. Kwak. 2013. "Tomography and High-Resolution Electron Microscopy Study of Surfaces and Porosity in a Plate-Like ?-Al2O3." Journal of Physical Chemistry C 117, no. 1:179-186. PNNL-SA-89028. doi:10.1021/jp306800h
  • Kwak J., L. Kovarik, and J. Szanyi. 2013. "CO2 Reduction on Supported Ru/Al2O3 Catalysts: Cluster Size Dependence of Product Selectivity." ACS Catalysis 3, no. 11:2449-2455. PNNL-SA-98443. doi:10.1021/cs400381f
  • Kwak J., L. Kovarik, and J. Szanyi. 2013. "Heterogeneous Catalysis on Atomically Dispersed Supported Metals: CO2 Reduction on Multifunctional Pd Catalysts." ACS Catalysis 3, no. 9:2094-2100. PNNL-SA-90666. doi:10.1021/cs4001392
  • Li W., L. Kovarik, D. Mei, J. Liu, Y. Wang, and C.H. Peden. 2013. "Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres." Nature Communications 4. PNNL-SA-92040. doi:10.1038/ncomms3481
  • McCloy J.S., W. Jiang, T.C. Droubay, T. Varga, L. Kovarik, J.A. Sundararajan, and M. Kaur, et al. 2013. "Ion irradiation of Fe-Fe oxide core-shell nanocluster films: Effect of interface on stability of magnetic properties." Journal of Applied Physics 114, no. 8:083903:1-9. PNNL-SA-95858. doi:10.1063/1.4818309
  • Mei D., V.M. Lebarbier, R.J. Rousseau, V.A. Glezakou, K.O. Albrecht, L. Kovarik, and M.D. Flake, et al. 2013. "Comparative Investigation of Benzene Steam Reforming over Spinel Supported Rh and Ir Catalysts." ACS Catalysis 3, no. 6:1133-1143. PNNL-SA-93222. doi:10.1021/cs4000427
  • Sun J., A.M. Karim, H. Zhang, L. Kovarik, X.S. Li, A. Hensley, and J. McEwen, et al. 2013. "Carbon-Supported bimetallic Pd-Fe catalysts for vapor-phase hydrodeoxygenation of guaiacol." Journal of Catalysis 306, no. 1:47-57. PNNL-SA-86936. doi:10.1016/j.jcat.2013.05.020
  • Wang C.M., T.C. Kaspar, V. Shutthanandan, A.G. Joly, L. Kovarik, B.W. Arey, and M. Gu, et al. 2013. "Structure And Radiation Damage Behavior Of Epitaxial CrxMo1-x Alloy Thin Films On MgO." Journal of Nuclear Materials 437, no. 1-3:55-61. PNNL-SA-92123. doi:10.1016/j.jnucmat.2013.01.345
  • Yang F., D.R. Coughlin, P.J. Phillips, L. Yang, A. Devaraj, L. Kovarik, and R.D. Noebe, et al. 2013. "Structure Analysis of a Precipitate Phase in an Ni-Rich High Temperature NiTiHf Shape Memory Alloy." Acta Materialia 61, no. 9:3335-3346. PNNL-SA-91683. doi:10.1016/j.actamat.2013.02.023


  • Benavidez A.D., L. Kovarik, A. Genc, N. Agrawal, E.M. Larsson, T.W. Hansen, and A.M. Karim, et al. 2012. "Environmental Transmission Electron Microscopy Study of the Origins of Anomalous Particle Size Distributions in Supported Metal Catalysts." ACS Catalysis 2, no. 11:2349-2356. PNNL-SA-89922. doi:10.1021/cs3005117
  • Brandes M.C., L. Kovarik, M.K. Miller, and M.J. Mills. 2012. "Morphology, structure, and chemistry of nanoclusters in a mechanically alloyed nanostructured ferritic steel." Journal of Materials Science 47, no. 8:3913-3923. PNNL-SA-75316. doi:10.1007/s10853-012-6249-x
  • Ilton E.S., J.S. Lazama Pacheco, J.R. Bargar, J.R. Bargar, Z. Shi, J. Liu, and L. Kovarik, et al. 2012. "Reduction of U(VI) Incorporated in the Structure of Hematite." Environmental Science & Technology 46, no. 17:9428-9436. PNNL-SA-87404. doi:10.1021/es3015502
  • Jiang W., R.M. Van Ginhoven, L. Kovarik, J.E. Jaffe, and B.W. Arey. 2012. "Superlattice Structure and Precipitates in O+ and Zr+ Ion Coimplanted SrTiO3: a Model Waste Form for 90Sr." Journal of Physical Chemistry C 116, no. 31:16709-16715. PNNL-SA-85385. doi:10.1021/jp301343b
  • Jozwik Biala I., J.K. Jagielski, L. Thome, B.W. Arey, L. Kovarik, G. Sattonay, and A. Debelle, et al. 2012. "HRTEM study of track evolution in 120-MeV U irradiated Gd2Ti2O7." Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 286. PNNL-SA-81728. doi:10.1016/j.nimb.2011.12.040
  • Karim A.M., C.J. Howard, B.Q. Roberts, L. Kovarik, L. Zhang, D.L. King, and Y. Wang. 2012. "In Situ X-ray Absorption Fine Structure Studies on the Effect of pH on Pt Electronic Density during Aqueous Phase Reforming of Glycerol." ACS Catalysis 2, no. 11:2387-2394. PNNL-SA-89904. doi:10.1021/cs3005049
  • Kovarik L., and M.J. Mills. 2012. "Ab Initio Analysis of Guinier-Preston-Bagaryatsky Zone Nucleation in Al-Cu-Mg Alloys." Acta Materialia 60, no. 9:3861-3872. PNNL-SA-86914. doi:10.1016/j.actamat.2012.03.044
  • Kwak J., R.G. Tonkyn, D.N. Tran, D. Mei, S. Cho, L. Kovarik, and J.H. Lee, et al. 2012. "Size-dependent catalytic performance of CuO on ?-Al2O3: NO reduction versus NH3 oxidation." ACS Catalysis 2, no. 7:1432-1440. PNNL-SA-81197. doi:10.1021/cs3002463
  • Lebarbier V.M., R.A. Dagle, L. Kovarik, J.A. Lizarazo Adarme, D.L. King, and D.R. Palo. 2012. "Synthesis of Methanol and Dimethyl Ether from Syngas over Pd/ZnO/Al2O3 Catalysts." Catalysis Science & Technology 2, no. 10:2116-2127. PNNL-SA-85225. doi:10.1039/C2CY20315D
  • Lemmon J.P., E. Polikarpov, W.D. Bennett, and L. Kovarik. 2012. "Thin Metal Oxide Films to Modify a Window Layer in CdTe-Based Solar Cells for Improved Performance." Applied Physics Letters 100, no. 21:Article No, 213908. PNNL-SA-86428. doi:10.1063/1.4722921
  • Peretyazhko T., J.M. Zachara, R.K. Kukkadapu, S.M. Heald, I.V. Kutnyakov, C.T. Resch, and B.W. Arey, et al. 2012. "Pertechnetate (TcO4-) reduction by reactive ferrous iron forms in naturally anoxic, redox transition zone sediments from the Hanford Site, USA." Geochimica et Cosmochimica Acta 92. PNNL-SA-84692.
  • Phillips P.J., M. De Graef, L. Kovarik, A. Agrawal, W. Windl, and M.J. Mills. 2012. "Atomic-resolution defect contrast in low angle annular dark-field STEM." Ultramicroscopy 116. PNNL-SA-80284. doi:10.1016/j.ultramic.2012.03.013
  • Qafoku O., L. Kovarik, R.K. Kukkadapu, E.S. Ilton, B.W. Arey, J. Tucek, and A.R. Felmy. 2012. "Fayalite Dissolution and Siderite Formation in Water-Saturated Supercritical CO2." Chemical Geology 332-333. PNNL-SA-90841. doi:10.1016/j.chemgeo.2012.09.028
  • Rajachidambaram M., T. Varga, L. Kovarik, R.P. Sanghavi, V. Shutthanandan, S. Thevuthasan, and S. Han, et al. 2012. "Formation of zinc oxide films using submicron zinc particle dispersions." Journal of Vacuum Science and Technology Part B. Nanotechnology & Microelectronics 30, no. 4:Article No. 041805. PNNL-SA-88467. doi:10.1116/1.4731255
  • Vorontsov V.A., L. Kovarik, M.J. Mills, and C. Rae. 2012. "High Resolution Electron Microscopy Of Dislocation Ribbons In A CMSX-4 Superalloy single crystal." Acta Materialia 60, no. 12:4673-4996. PNNL-SA-87981. doi:10.1016/j.actamat.2012.05.014
  • Wang C.M., X. Li, Z. Wang, W. Xu, J. Liu, F. Gao, and L. Kovarik, et al. 2012. "In Situ TEM Investigation of Congruent Phase Transition and Structural Evolution of Nanostructured Silicon/Carbon Anode for Lithium Ion Batteries." Nano Letters 12, no. 3:1624-1632. PNNL-SA-84904. doi:10.1021/nl204559u
  • Wu T., D. Childers, C. Gomez, A.M. Karim, N. Schweitzer, A. Kropf, and H. Wang, et al. 2012. "General Method for Determination of the Surface Composition in Bimetallic Nanoparticle Catalysts from the L Edge X-ray Absorption Near-Edge Spectra." ACS Catalysis 2, no. 11:2433-2443. PNNL-SA-89152. doi:10.1021/cs3004566
  • Xiao J., X. Chen, P.V. Sushko, M.L. Sushko, L. Kovarik, J. Feng, and Z. Deng, et al. 2012. "High-Performance LiNi0.5Mn1.5O4 Spinel Controlled by Mn3+ Concentration and Site Disorder." Advanced Materials 24, no. 16:2109-2116. PNNL-SA-84168. doi:10.1002/adma.201104767
  • Xiao L., Y. Cao, J. Xiao, W. Wang, L. Kovarik, Z. Nie, and J. Liu. 2012. "High capacity, reversible alloying reactions in SnSb/C nanocomposites for Na-ion battery applications." Chemical Communications 48, no. 27:3321-3323. PNNL-SA-85851. doi:10.1039/C2CC17129E
  • Yang F., L. Kovarik, P.J. Phillips, R.D. Noebe, and M.J. Mills. 2012. "Characterizations Of Precipitate Phases In a Ti-Ni-Pd Alloy." Scripta Materialia 67, no. 2:145-148. PNNL-SA-87982. doi:10.1016/j.scriptamat.2012.04.003
  • Zheng J., J. Xiao, X. Yu, L. Kovarik, M. Gu, F. Omenya, and X. Chen, et al. 2012. "Enhanced Li+ ion transport in LiNi0.5Mn1.5O4 through Control of Site Disorder." Physical Chemistry Chemical Physics. PCCP 14, no. 39:13515-13521. PNNL-SA-88177.


  • Arey B.W., L. Kovarik, Z. Wang, and A.R. Felmy. 2011. "Investigation of Mineral Transformations in Wet Supercritical CO2 by Electron Microscopy." Microscopy and Microanalysis 17, no. Suppl S2:1928-1929. PNNL-SA-81736. doi:10.1017/S1431927611010518
  • Bowker R.H., M.C. Smith, M. Pease, K.M. Slenkamp, L. Kovarik, and M.E. Bussell. 2011. "Synthesis and Hydrodeoxygenation Properties of Ruthenium Phosphide Catalysts." ACS Catalysis 1, no. 8:917-922. PNNL-SA-80947. doi:10.1021/cs200238v
  • Kovarik L., and M.J. Mills. 2011. "Structural Relationship Between One-Dimensional Crystals of Guinier-Preston-Bagaryatsky Zones in Al-Cu-Mg Alloys." Scripta Materialia 64, no. 11:999-1002. PNNL-SA-76716. doi:10.1016/j.scriptamat.2011.01.033
  • Lea A.S., B.C. Kabius, B.W. Arey, L. Kovarik, C.M. Wang, G. Orr, and I. Lyubinetsky, et al. 2011. "Quietly Building Capabilities: New Instruments, Expertise, "Quiet Wing" Available at DOE User Facility." Microscopy Today 19, no. 5:48-53. PNNL-SA-81095. doi:10.1017/S1551929511000964
  • Sanghavi R.P., R. Devanathan, M.I. Nandasiri, S.N. Kuchibhatla, L. Kovarik, S. Thevuthasan, and S. Prasad. 2011. "Integrated experimental and modeling study of the ionic conductivity of samaria-doped ceria thin films." Solid State Ionics 204-205. PNNL-SA-76714. doi:10.1016/j.ssi.2011.10.007
  • Unocic R.R., N. Zhou, L. Kovarik, C. Shen, Y. Wang, and M.J. Mills. 2011. "Dislocation decorrelation and relationship to deformation microtwins during creep of a y' precipitate strengthened Ni-based superalloy." Acta Materialia 59, no. 19:7325-7339. PNNL-SA-79523. doi:10.1016/j.actamat.2011.07.069

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