Staff information

Biography

Dr. János Szanyi is a Staff Scientist in the Catalysis Science Group within the Physical Sciences Division at the Pacific Northwest National Laboratory (PNNL). He joined PNNL in 2001 after working five years for PPG Industries, Inc., in Pittsburgh, PA as a Senior Research Chemist. Szanyi`s main research interests are in surface chemistry and catalysis; in particular the understanding of elementary reactions steps on model and real catalytic systems using a variety of spectroscopic techniques (primarily FTIR). After graduating from the University of Szeged, Hungary in chemistry, he conducted his graduate research at the Central Research Institute for Chemistry of the Hungarian Academy of Sciences and received a Doctor of University degree in chemistry from the University of Szeged. His graduate work involved the investigation of toluene alkylation on zeolites, and studying the acid-base properties of zeolites. Next he joined Prof. Jack H. Lunsford`s group at Texas A&M University as a post-doc and conducted research on the partial oxidation of methane. In order to learn more about the techniques and methods used in surface science, he joined Prof. D. Wayne Goodman`s group at Texas A&M University and received a Ph.D. degree in physical chemistry. In his graduate work he studied the catalytic and structural properties of model bimetallic catalysts. After graduation he spent three years at the Los Alamos National Laboratory and worked as a post-doc under the supervision of Dr. Mark T. Paffett, studying the structural and catalytic properties of model alloy systems, and the mechanism of NOx reduction on zeolite-based catalysts. In his current position he is studying the chemistry of base metal oxide nanostructures supported on oxide film films or metal substrates. His research is focused on the understanding of the fundamentals of the interactions between environmentally harmful compounds (NOx, COx, and SOx) and metal and metal oxide nanostructures.

Research Interests

• Experimental surface chemistry and catalysis on metal and metal oxide surfaces
• Spectroscopic characterization of surface species relevant to the understanding of the kinetics and mechanisms of environmentally important catalytic reactions
• Preparation and characterization of oxide nanostructures
• Operando kinetic/spectroscopic studies of heterogeneous catalytic processes

Education and Credentials

• 2006-present Staff Scientist, Catalysis Science, Pacific Northwest National Laboratory, Richland, WA
• 2001-2006 Senior Research Scientist II, Interfacial Chemistry and Engineering, Pacific Northwest National Laboratory, Richland, WA
• 1996-2001 Research Scientist, Glass Technology Center, PPG Industries, Inc., Pittsburgh, PA
• 1993-1996 Postdoctoral Research Associate, Chemical Sciences Division, Los Alamos National Laboratory, Los Alamos, NM (Advisor: Dr. MT Paffett)
• 1988-1993 Ph.D., Physical Chemistry, Texas A&M University, College Station, TX (Advisor: Prof. DW Goodman)
• 1987-1988 Postdoctoral Research Associate, Texas A&M University, College Station, TX (Advisor: Prof. JH Lunsford)
• 1982-1986 Doctor of University, Central Research Institute for Chemistry of the Hungarian Academy of Sciences, Budapest, Hungary
• 1977-1982 B.S. Chemistry, University of Szeged, Szeged, Hungary

Affiliations and Professional Service

• Member of the American Chemical Society
• Member of the North American Catalysis Society
• Scientific Advisory Board Member to Catalysis Letters

Awards and Recognitions

• Guest editor for the Festschrift issue of The Journal of Physical Chemistry C in honor of Professor D. Wayne Goodman, Texas A&M University (2010)
• Fulbright Fellowship, 2009
• Recipient of the 1st PNGV Award, March 31 1996, White House, Washington DC

PNNL Publications

2024

• Khivantsev K., M.A. Derewinski, L. Kovarik, M.E. Bowden, X.S. Li, N.R. Jaegers, and D. Boglaienko, et al. 2024. "Increasing Al-pair abundance in SSZ-13 zeolite via zeolite synthesis in the presence of alkaline earth metal hydroxide produces hydrothermally stable Co- and Pd-SSZ-13 materials." Catalysts 14, no. 1:Art. No. 56. PNNL-SA-161285. doi:10.3390/catal14010056
• Kovarik L., M.E. Bowden, K. Khivantsev, J. Kwak, and J. Szanyi. 2024. "Structural complexity of gamma-Al2O3: the nature of vacancy ordering and the structure of complex antiphase boundaries." Acta Materialia 266. PNNL-SA-184466. doi:10.1016/j.actamat.2023.119639
• Song I., Y. Wang, J. Szanyi, and K. Khivantsev. 2024. "Co-existence of atomically dispersed Ru and Ce3+ sites is responsible for excellent low temperature N2O reduction activity of Ru/CeO2." Applied Catalysis B: Environmental 343. PNNL-SA-192651. doi:10.1016/j.apcatb.2023.123487

2023

• Chen L., J. de Barros Dias Moreira, L. Meyer, and J. Szanyi. 2023. "Efficient and Selective Dual-Pathway Polyolefin Hydro-Conversion over Unexpectedly Bifunctional M/TiO2-Anatase Catalysts." Applied Catalysis B: Environmental 335. PNNL-SA-186365. doi:10.1016/j.apcatb.2023.122897
• 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
• 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
• Loughran R.P., T. Hurley, A. Gladysiak, A. Chidambaram, K. Khivantsev, E.D. Walter, and T.R. Graham, et al. 2023. "CO2 capture from wet flue gas using a water-stable and cost-effective metal-organic framework." Cell Reports Physical Science 4, no. 7:Art. No. 101470. PNNL-SA-171951. doi:10.1016/j.xcrp.2023.101470
• Song I., I.Z. Koleva, H.A. Aleksandrov, L. Chen, J. Heo, D. Li, and Y. Wang, et al. 2023. "Ultrasmall Pd clusters in FER zeolite alleviate CO poisoning for effective low-temperature carbon monoxide oxidation." Journal of the American Chemical Society 145, no. 50:27493-27499. PNNL-SA-192664. doi:10.1021/jacs.3c08916

2022

• 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
• Khivantsev K., J. Kwak, N.R. Jaegers, I.Z. Koleva, G. Vayssilov, M.A. Derewinski, and Y. Wang, et al. 2022. "Identification of the mechanism of NO reduction with ammonia (SCR) on zeolite catalysts." Chemical Science 13, no. 35:10383-10394. PNNL-SA-175846. doi:10.1039/D2SC00350C
• 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
• Pham H., A. DelaRiva, E.J. Peterson, R. Alcala, K. Khivantsev, J. Szanyi, and X.S. Li, et al. 2022. "Designing Ceria/Alumina for Efficient Trapping of Platinum Single Atoms." ACS Sustainable Chemistry & Engineering 10, no. 23:7603-7612. PNNL-SA-173717. doi:10.1021/acssuschemeng.2c01380
• Song I., K. Khivantsev, Y. Wang, and J. Szanyi. 2022. "Elucidating the role of CO in NO storage mechanism on Pd/SSZ-13 with in situ DRIFTS." Journal of Physical Chemistry C 126, no. 3:1439-1449. PNNL-SA-168814. doi:10.1021/acs.jpcc.1c10163
• Song I., K. Khivantsev, Y. Wu, M.E. Bowden, Y. Wang, and J. Szanyi. 2022. "Unusual water-assisted NO adsorption over Pd/FER calcined at high temperatures: The effect of cation migration." Applied Catalysis B: Environmental 318. PNNL-SA-172537. doi:10.1016/j.apcatb.2022.121810

2021

• Andana T., K.G. Rappe, F. Gao, J. Szanyi, X. Pereira Hernandez, and Y. Wang. 2021. "Recent advances in hybrid metal oxide-zeolite catalysts for low-temperature selective catalytic reduction of NOx by ammonia." Applied Catalysis B: Environmental 291. PNNL-SA-160484. doi:10.1016/j.apcatb.2021.120054
• 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
• 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
• 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
• Kim Y., G.B. Collinge, M. Lee, K. Khivantsev, S. Cho, V. Glezakou, and R.J. Rousseau, et al. 2021. "Surface Density Dependent Catalytic Activity of Single Palladium Atoms Supported on Ceria." Angewandte Chemie International Edition 60, no. 42:22769-22775. PNNL-SA-159438. doi:10.1002/anie.202105750
• 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
• Lin F., T. Andana, Y. Wu, J. Szanyi, Y. Wang, and F. Gao. 2021. "Catalytic Site Requirements for N2O Decomposition on Cu-, Co-, and Fe-SSZ-13 Zeolites." Journal of Catalysis 401. PNNL-SA-159162. doi:10.1016/j.jcat.2021.07.012
• Maluf N., A.H. Braga, M. Gothe, L. Borges, G. Alves, R.V. Goncalves, and J. Szanyi, et al. 2021. "Zeolitic-imidazolate framework derived intermetallic nickel zinc carbide material as a selective catalyst for CO2 to CO reduction at high pressure." European Journal of Inorganic Chemistry 2021, no. 44:4521-4529. PNNL-SA-163626. doi:10.1002/ejic.202100530
• Wang A., Y. Chen, E.D. Walter, N.M. Washton, T. Varga, Y. Wang, and J. Szanyi, et al. 2021. "Remarkable self-degradation of Cu/SAPO-34 selective catalytic reduction catalysts during storage at ambient conditions." Catalysis Today 360. PNNL-SA-148098. doi:10.1016/j.cattod.2020.01.034
• 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

2020

• Braga A.H., N.J. Costa, K. Philippot, R.V. Goncalves, J. Szanyi, and L. Rossi. 2020. "Structure and activity of supported bimetallic NiPd nanoparticles: influence of preparation method on CO2 reduction." ChemCatChem 12, no. 11:2967-2976. PNNL-SA-152908. doi:10.1002/cctc.201902329
• Cui Y., Y. Wang, E.D. Walter, J. Szanyi, Y. Wang, and F. Gao. 2020. "Influences of Na+ co-cation on the structure and performance of Cu/SSZ-13 selective catalytic reduction catalysts." Catalysis Today 339. PNNL-SA-138691. doi:10.1016/j.cattod.2019.02.037
• 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
• 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
• Lee J., E. Jang, D. Oh, J. Szanyi, and J. Kwak. 2020. "Morphology and size of Pt on Al2O3: The role of specific metal-support interactions between Pt and Al2O3." Journal of Catalysis 385. PNNL-SA-155322. doi:10.1016/j.jcat.2020.03.019
• Nelson N.C., and J. Szanyi. 2020. "Heterolytic hydrogen activation: Understanding support effects in water-gas shift, hydrodeoxygenation, and CO oxidation catalysis." ACS Catalysis 10, no. 10:5663-5671. PNNL-SA-148219. doi:10.1021/acscatal.0c01059
• Peng B., K.G. Rappe, Y. Cui, F. Gao, J. Szanyi, M.J. Olszta, and E.D. Walter, et al. 2020. "Enhancement of high-temperature selectivity on Cu-SSZ-13 towards NH3-SCR reaction from highly dispersed ZrO2." Applied Catalysis B: Environmental 263. PNNL-SA-146190. doi:10.1016/j.apcatb.2019.118359
• Zhang Y., Y. Wu, Y. Peng, J. Li, E.D. Walter, Y. Chen, and N.M. Washton, et al. 2020. "Quantitative Cu counting methodologies for Cu/SSZ-13 selective catalytic reduction catalysts by electron paramagnetic resonance spectroscopy." Journal of Physical Chemistry C 124, no. 51:28061-28073. PNNL-SA-156011. doi:10.1021/acs.jpcc.0c07971

2019

• Chen H., M. Kollar, Z. Wei, F. Gao, Y. Wang, J. Szanyi, and C. Peden. 2019. "Formation of NO+ and its possible roles during the selective catalytic reduction of NOx with NH3 on Cu-CHA catalysts." Catalysis Today 320. PNNL-SA-129558. doi:10.1016/j.cattod.2017.12.022
• Cui Y., Y. Wang, D. Mei, E.D. Walter, N.M. Washton, J.D. Holladay, and Y. Wang, et al. 2019. "Revisiting effects of alkali metal and alkaline earth co-cation additives to Cu/SSZ-13 selective catalytic reduction catalysts." Journal of Catalysis 378. PNNL-SA-141699. doi:10.1016/j.jcat.2019.08.028
• Falbo L., C.G. Visconti, L. Lietti, and J. Szanyi. 2019. "The effect of CO on CO2 methanation over Ru/Al2O3 catalysts: a combined steady-state reactivity and transient DRIFT spectroscopy study." Applied Catalysis B: Environmental 256. PNNL-SA-134496. doi:10.1016/j.apcatb.2019.117791
• 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., 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
• Mei D., F. Gao, J. Szanyi, and Y. Wang. 2019. "Mechanistic insight into the passive NOx adsorption in the highly dispersed Pd/HBEA zeolite." Applied Catalysis A: General 569. PNNL-SA-154539. doi:10.1016/j.apcata.2018.10.037
• Nelson N.C., M. Nguyen, V. Glezakou, R.J. Rousseau, and J. Szanyi. 2019. "Carboxyl intermediate formation via an in situ-generated metastable active site during water-gas shift catalysis." Nature Catalysis 2, no. 10:916-924. PNNL-SA-141247. doi:10.1038/s41929-019-0343-2
• Wang A., Y. Chen, E.D. Walter, N.M. Washton, D. Mei, T. Varga, and Y. Wang, et al. 2019. "Unraveling the mysterious failure of Cu/SAPO-34 selective catalytic reduction catalysts." Nature Communications 10, no. 1:Article No. 1137. PNNL-SA-138654. doi:10.1038/s41467-019-09021-3

2018

• Gao F., and J. Szanyi. 2018. "NOx reduction - The stream of change." Nature Catalysis 1, no. 3:174-175. PNNL-SA-132248. doi:10.1038/s41929-018-0039-z
• Gao F., and J. Szanyi. 2018. "On the hydrothermal stability of Cu/SSZ-13 SCR catalysts." Applied Catalysis A: General 560. PNNL-SA-132960. doi:10.1016/j.apcata.2018.04.040
• Heo I., S.J. Schmieg, S.H. Oh, W. Li, C. Peden, C.H. Kim, and J. Szanyi. 2018. "Improved Thermal Stability of a Copper-containing Ceria-based Catalyst for Low Temperature CO Oxidation under Simulated Diesel Exhaust Conditions." Catalysis Science & Technology 8, no. 5:1383-1394. PNNL-SA-130562. doi:10.1039/C7CY02288C
• 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
• Szanyi J., D. Mei, T. Varga, C. Peden, I. Heo, S.H. Oh, and C.H. Kim. 2018. "Where does the sulphur go? Deactivation of a low temperature CO oxidation catalyst by sulphur poisoning." Catalysis Letters 148, no. 5:1445-1450. PNNL-SA-130691. doi:10.1007/s10562-018-2343-2

2017

• Chimenton R.J., R.J. Chimentao, B.C. Miranda, J. Szanyi, C. Sepulveda, J.O. Santos, and J.V. Correa, et al. 2017. "Sources of deactivation during glycerol conversion on Ni/?-Al2O3." Molecular Catalysis 435. PNNL-SA-124806. doi:10.1016/j.mcat.2017.03.023
• Gao F., D. Mei, Y. Wang, J. Szanyi, and C. Peden. 2017. "Selective Catalytic Reduction over Cu/SSZ-13: Linking Homo- and Heterogeneous Catalysis." Journal of the American Chemical Society 139, no. 13:4935-4942. PNNL-SA-123327. doi:10.1021/jacs.7b01128
• 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
• Li S., Y. Zheng, F. Gao, J. Szanyi, and W.F. Schneider. 2017. "Experimental and Computational Interrogation of Fast SCR Mechanism and Active Sites on H-form SSZ-13." ACS Catalysis 7, no. 8:5087-5096. PNNL-SA-125720. doi:10.1021/acscatal.7b01319
• Prodinger S., M.A. Derewinski, Y. Wang, N.M. Washton, E.D. Walter, J. Szanyi, and F. Gao, et al. 2017. "Sub-micron Cu/SSZ-13: synthesis and application as selective catalytic reduction (SCR) catalysts." Applied Catalysis B: Environmental 201. PNNL-SA-117975. doi:10.1016/j.apcatb.2016.08.053
• Wang X., H. Shi, and J. Szanyi. 2017. "Controlling Selectivities in CO2 Reduction through Mechanistic Understanding." Nature Communications 8. PNNL-SA-123127. doi:10.1038/s41467-017-00558-9
• 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

2016

• Chen H., Z. Wei, M. Kollar, F. Gao, Y. Wang, J. Szanyi, and C.H. Peden. 2016. "NO oxidation on Zeolite Supported Cu Catalysts: Formation and Reactivity of Surface Nitrates." Catalysis Today 267. PNNL-SA-112957. doi:10.1016/j.cattod.2015.11.039
• Gao F., J. Szanyi, Y. Wang, B. Schwenzer, M. Kollar, and C.H. Peden. 2016. "Hydrothermal aging effects on Fe/SSZ-13 and Fe/beta NH3-SCR catalysts." Topics in Catalysis 59, no. 10:882-886. PNNL-SA-111293. doi:10.1007/s11244-016-0563-5
• Gao F., Y. Zheng, R.K. Kukkadapu, Y. Wang, E.D. Walter, B. Schwenzer, and J. Szanyi, et al. 2016. "Iron loading effects in Fe/SSZ-13 NH3-SCR catalysts: nature of the Fe-ions and structure-function relationships." ACS Catalysis 6, no. 5:2939-2954. PNNL-SA-113591. doi:10.1021/acscatal.6b00647
• Hu J.Z., S. Xu, J. Kwak, M.Y. Hu, C. Wan, Z. Zhao, and J. Szanyi, et al. 2016. "High Field 27Al MAS NMR and TPD studies of active sites in ethanol dehydration using thermally treated transitional aluminas as catalysts." Journal of Catalysis 336, no. 1:85-93. PNNL-SA-106119. doi:10.1016/j.jcat.2016.01.006
• Hu J.Z., S. Xu, J. Kwak, M.Y. Hu, C. Wan, Z. Zhao, and J. Szanyi, et al. 2016. "High field 27Al MAS NMR and TPD studies of active sites in ethanol dehydration using thermally treated transitional aluminas as catalysts." Journal of Catalysis 336. PNNL-SA-110979. doi:10.1016/j.jcat.2016.01.006
• Kim B., Z. Dohnalek, J. Szanyi, B.D. Kay, and Y. Kim. 2016. "Temperature-programmed Desorption Study of NO Reactions on Rutile TiO2(110)-1x1." Surface Science 652. PNNL-SA-114302. doi:10.1016/j.susc.2016.01.032
• Kwak J., J. Lee, J. Szanyi, and C.H. Peden. 2016. "Modification of the acid/base properties of ?-Al2O3 by oxide additives: An ethanol TPD investigation." Catalysis Today 265. PNNL-SA-112451. doi:10.1016/j.cattod.2015.07.042
• Righini L., F. Gao, L. Lietti, J. Szanyi, and C.H. Peden. 2016. "Performance and Properties of K and TiO2 Based LNT Catalysts." Applied Catalysis B: Environmental 181. PNNL-SA-111313. doi:10.1016/j.apcatb.2015.07.008
• Szanyi J., F. Gao, J. Kwak, M. Kollar, Y. Wang, and C.H. Peden. 2016. "Characterization of Fe2+ Ions in Fe,H/SSZ-13 Zeolites: FTIR Spectroscopy of CO and NO Probe Molecules." Physical Chemistry Chemical Physics 18, no. 15:10473-10485. PNNL-SA-115304. doi:10.1039/c6cp00136j
• Wang X., Y. Hong, H. Shi, and J. Szanyi. 2016. "Kinetic Modeling and Transient DRIFTS-MS Studies of CO2 Methanation over Ru/Al2O3 Catalysts." Journal of Catalysis 343. PNNL-SA-113614. doi:10.1016/j.jcat.2016.02.001
• Yi C.W., and J. Szanyi. 2016. "Pd overlayer on Oxygen pre-covered Graphene/Ru(0001): Thermal Stability." Surface Science 648. PNNL-SA-111474. doi:10.1016/j.susc.2015.12.018
• Zhang R., J. Szanyi, F. Gao, and J. McEwen. 2016. "The interaction of reactants, intermediates and products with Cu ions in Cu-SSZ-13 NH3 SCR catalysts: An energetic and ab initio X-ray absorption modeling study." Catalysis Science & Technology 6, no. 15:5812-5829. PNNL-SA-107615. doi:10.1039/C5CY02252E
• Zhang R., J. Szanyi, F. Gao, and J. McEwen. 2016. "The interaction of reactants, intermediates and products with Cu ions in Cu-SSZ-13 NH3 SCR catalysts: an energetic and ab initio X-ray absorption modeling study." Catalysis Science & Technology 6, no. 15:5812-5829. PNNL-SA-123281. doi:10.1039/c5cy02252e

2015

• Beale A.M., F. Gao, I. Lezcano-Gonzalez, C.H. Peden, and J. Szanyi. 2015. "Recent advances in automotive catalysis for NOx emission control by small-pore microporous materials." Chemical Society Reviews 44, no. 20:7371-7405. PNNL-SA-108003. doi:10.1039/c5cs00108k
• Chen H., Z. Wei, M. Kollar, F. Gao, Y. Wang, J. Szanyi, and C.H. Peden. 2015. "A Comparative Study of N2O Formation during the Selective Catalytic Reduction of NOx with NH3 on Zeolite Supported Cu Catalysts." Journal of Catalysis 329. PNNL-SA-108655. doi:10.1016/j.jcat.2015.06.016
• Gao F., E.D. Walter, N.M. Washton, J. Szanyi, and C.H. Peden. 2015. "Synthesis and Evaluation of Cu/SAPO-34 Catalysts for NH3-SCR 2: Solid-state Ion Exchange and One-pot Synthesis." Applied Catalysis B: Environmental 162. PNNL-SA-99073. doi:10.1016/j.apcatb.2014.07.029
• Gao F., M. Kollar, R.K. Kukkadapu, N.M. Washton, Y. Wang, J. Szanyi, and C.H. Peden. 2015. "Fe/SSZ-13 as an NH3-SCR Catalyst: A Reaction Kinetics and FTIR/Mössbauer Spectroscopic Study." Applied Catalysis B: Environmental 164. PNNL-SA-104426. doi:10.1016/j.apcatb.2014.09.031
• Gao F., N.M. Washton, Y. Wang, M. Kollar, J. Szanyi, and C.H. Peden. 2015. "Effects of Si/Al Ratio on Cu/SSZ-13 NH3-SCR Catalysts: Implications for the active Cu species and the Roles of Brønsted Acidity." Journal of Catalysis 331. PNNL-SA-112409. doi:10.1016/j.jcat.2015.08.004
• Gao F., Y. Wang, M. Kollar, N.M. Washton, J. Szanyi, and C.H. Peden. 2015. "A Comparative Kinetics Study between Cu/SSZ-13 and Fe/SSZ-13 SCR Catalysts." Catalysis Today 258, no. Part 2:347-358. PNNL-SA-106260. doi:10.1016/j.cattod.2015.01.025
• Gao F., Y. Wang, N.M. Washton, M. Kollar, J. Szanyi, and C.H. Peden. 2015. "Effects of Alkali and Alkaline Earth Cocations on the Activity and Hydrothermal Stability of Cu/SSZ-13 NH3-SCR Catalysts." ACS Catalysis 5, no. 11:6780-6791. PNNL-SA-111791. doi:10.1021/acscatal.5b01621
• 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
• Lee J., H. Jeon, D. Oh, J. Szanyi, and J. Kwak. 2015. "Morphology-dependent phase transformation of y-Al2O3." Applied Catalysis A: General 500. PNNL-SA-108501. doi:10.1016/j.apcata.2015.03.040
• Miranda B.C., R.J. Chimentao, J. Szanyi, A.H. Braga, J.O. Santos, F. Gispert-Guirado, and J. Llorca, et al. 2015. "Influence of copper on nickel-based catalysts in the conversion of glycerol." Applied Catalysis B: Environmental 166-167. PNNL-SA-106690. doi:10.1016/j.apcatb.2014.11.019
• Szanyi J., and J. Kwak. 2015. "Photo-catalytic oxidation of acetone on a TiO2 powder: An in situ FTIR investigation." Journal of Molecular Catalysis. A, Chemical. 406. PNNL-SA-106082. doi:10.1016/j.molcata.2015.05.025
• Wang X., H. Shi, J. Kwak, and J. Szanyi. 2015. "Mechanism of CO2 hydrogenation on Pd/Al2O3 catalysts: kinetics and transient DRIFTS-MS studies." ACS Catalysis 5, no. 11:6337-6349. PNNL-SA-111586. doi:10.1021/acscatal.5b01464
• Yi C.W., and J. Szanyi. 2015. "The Thermal Behavior of Pd on Graphene/Ru(0001)." Surface Science 641. PNNL-SA-108849. doi:10.1016/j.susc.2015.06.005

2014

• Gao F., E.D. Walter, M. Kollar, Y. Wang, J. Szanyi, and C.H. Peden. 2014. "Understanding ammonia selective catalytic reduction kinetics over Cu-SSZ-13 from motion of the Cu ions." Journal of Catalysis 319. PNNL-SA-101081. doi:10.1016/j.jcat.2014.08.010
• Kim D., K.K. Mudiyanselage, J. Szanyi, J.C. Hanson, and C.H. Peden. 2014. "Effect of H2O on the morphological changes of KNO3 formed on K2O/Al2O3 NOx storage materials: Fourier transform infra-red (FTIR) and time-resolved x-ray diffraction (TR-XRD) studies." Journal of Physical Chemistry C 118, no. 8:4189-4197. PNNL-SA-98940. doi:10.1021/jp410816r
• 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
• Kwak J., and J. Szanyi. 2014. "15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx/CeO2." Chemical Communications 50, no. 95:14998-15001. PNNL-SA-103967. doi:10.1039/c4cc05427j
• Kwak J., T. Varga, C.H. Peden, F. Gao, J.C. Hanson, and J. Szanyi. 2014. "Following the movement of Cu ions in a SSZ-13 zeolite during dehydration, reduction and adsorption: a combined in situ TP-XRD, XANES/DRIFTS study." Journal of Catalysis 314, no. 1:83-93. PNNL-SA-99882. doi:10.1016/j.jcat.2014.03.003
• Lercher J.A., A.M. Appel, T. Autrey, R.M. Bullock, D.M. Camaioni, H.M. Cho, and D.A. Dixon, et al. 2014. "Multifunctional Catalysts to Synthesize and Utilize Energy Carriers." In Frontiers at the Interface between Homogeneous and Heterogeneous Catalysis, II, 207-219. Washington, District Of Columbia:U.S. Department of Energy, Office of Science. PNNL-SA-103068.
• Stewart M.L., A. Zelenyuk, F. Gao, G.G. Muntean, C.H. Peden, K.G. Rappe, and J. Szanyi, et al. 2014. "CLEERS Aftertreatment Modeling and Analysis." In FY 2014 Progress Report for Advanced Combustion Engine Research and Development, edited by G Singh. III-13 - III-18. Washington, Dc:US Department of Energy: Energy Efficiency and Renewable Energy, Vehicle Technologies Office. PNNL-23797.
• Szanyi J., A.M. Karim, L.R. Pederson, J. Kwak, D. Mei, D.N. Tran, and D.R. Herling, et al. 2014. "Investigation of Mixed Oxide Catalysts for NO Oxidation." In FY 2014 Progress Report for Advanced Combustion Engine Research and Development, edited by G Singh. III-25 - III-29. Washington, Dc:US Department of Energy, Energy Efficiency and Renewable Energy, Vehicle Technologies Office. PNNL-24151.
• Szanyi J., and J. Kwak. 2014. "Dissecting the steps of CO2 reduction: 1. The interaction of CO and CO2 with ?-Al2O3: an in situ FTIR study." Physical Chemistry Chemical Physics 16, no. 29:15117-15125. PNNL-SA-100732. doi:10.1039/c4cp00616j
• Szanyi J., and J. Kwak. 2014. "Dissecting the steps of CO2 reduction: 2. The interaction of CO and CO2 with Pd/?-Al2O3: an in situ FTIR study." Physical Chemistry Chemical Physics 16, no. 29:15126-15138. PNNL-SA-100733. doi:10.1039/C4CP00617H
• Szanyi J., C.H. Peden, K. Howden, C.H. Kim, S.H. Oh, and S.J. Schmieg. 2014. "Thermally Stable Ultra-Low Temperature Oxidation Catalysts." In FY 2014 Progress Report for Advanced Combustion Engine Research and Development, edited by G Singh. III-61 - III-66. Washington, Dc:US Department of Energy, Energy Efficiency and Renewable Energy, Vehicle Technologies Office. PNNL-23813.
• Zhang R., J. McEwen, M. Kollar, F. Gao, Y. Wang, J. Szanyi, and C.H. Peden. 2014. "NO Chemisorption on Cu/SSZ-13: a Comparative Study from Infrared Spectroscopy and DFT Calculations." ACS Catalysis 4, no. 11:4093-4105. PNNL-SA-102388. doi:10.1021/cs500563s

2013

• Gao F., E.D. Walter, E.M. Karp, J. Luo, R.G. Tonkyn, J. Kwak, and J. Szanyi, et al. 2013. "Structure-Activity Relationships in NH3-SCR over Cu-SSZ-13 as Probed by Reaction Kinetics and EPR Studies." Journal of Catalysis 300, no. 1:20-29. PNNL-SA-91146. doi:10.1016/j.jcat.2012.12.020
• Gao F., E.D. Walter, N.M. Washton, J. Szanyi, and C.H. Peden. 2013. "Synthesis and Evaluation of Cu-SAPO-34 Catalysts for Ammonia Selective Catalytic Reduction. 1. Aqueous Solution Ion Exchange." ACS Catalysis 3, no. 9:2083-2093. PNNL-SA-96586. doi:10.1021/cs4004672
• Gao F., J. Kwak, J. Szanyi, and C.H. Peden. 2013. "Current Understanding of Cu-Exchanged Chabazite Molecular Sieves for Use as Commercial Diesel Engine DeNOx Catalysts." Topics in Catalysis 56, no. 15-17:1441-1459. PNNL-SA-95928. doi:10.1007/s11244-013-0145-8
• Kim D., K.K. Mudiyanselage, J. Szanyi, J. Kwak, H. Zhu, and C.H. Peden. 2013. "Effect of K loadings on nitrate formation/decomposition and on NOx storage performance of K-based NOx storage-reduction catalysts." Applied Catalysis. B, Environmental 142-143. PNNL-SA-86548. doi:10.1016/j.apcatb.2013.05.063
• 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., J.H. Lee, S.D. Burton, A.S. Lipton, C.H. Peden, and J. Szanyi. 2013. "A common intermediate for N2 formation in enzymes and zeolites: side-on Cu-nitrosyl complexes." Angewandte Chemie International Edition 52, no. 38:9985-9989. PNNL-SA-96945. doi:10.1002/anie.201303498
• 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
• Szanyi J., C.W. Yi, K.K. Mudiyanselage, and J. Kwak. 2013. "Understanding Automotive Exhaust Catalysts Using a Surface Science Approach: Model NOx Storage Materials." Topics in Catalysis 56, no. 15-17:1420-1440. PNNL-SA-99181. doi:10.1007/s11244-013-0152-9
• Szanyi J., J. Kwak, H. Zhu, and C.H. Peden. 2013. "Characterization of Cu-SSZ-13 NH3 SCR Catalysts: an in situ FTIR Study." Physical Chemistry Chemical Physics. PCCP 15, no. 7:2368-2380. PNNL-SA-91058. doi:10.1039/c2cp43467a
• Wang X., J.C. Hanson, J. Kwak, J. Szanyi, and C.H. Peden. 2013. "Cation Movements during Dehydration and NO2 Desorption in a Ba-Y,FAU zeolite: an in situ Time-resolved X-ray Diffraction Study." Journal of Physical Chemistry C 117, no. 8:3915-3922. PNNL-SA-90332. doi:10.1021/jp308307m
• Zhu H., J. Kwak, C.H. Peden, and J. Szanyi. 2013. "In situ DRIFTS-MS studies on the oxidation of adsorbed NH3 by NOx over a Cu-SSZ-13 zeolite." Catalysis Today 205. PNNL-SA-88850. doi:10.1016/j.cattod.2012.08.043

2012

• Devarakonda M.N., D.R. Herling, D. Kim, J. Kwak, C.H. Peden, M.L. Stewart, and A. Strzelec, et al. 2012. "CLEERS Aftertreatment Modeling and Analysis." In FY 2011 Progress Report for Advanced Combustion Engine Research and Development: Energy Efficiency and Renewable Energy Vehicle Technologies Program, edited by G Singh. 176-181. Washington Dc:US Department of Energy. PNNL-20935.
• Kim D., J. Kwak, J. Szanyi, and C.H. Peden. 2012. "Isothermal desulfation of pre-sulfated Pt-BaO/?-Al2O3 lean NOx trap catalysts with H2: the effect of H2 concentration and the roles of CO2 and H2O." Applied Catalysis. B, Environmental 111-112, no. 1:342-348. PNNL-SA-78545. doi:10.1016/j.apcatb.2011.10.017
• Kim D., K.K. Mudiyanselage, J. Szanyi, H. Zhu, J. Kwak, and C.H. Peden. 2012. "Characteristics of Pt-K/MgAl2O4 lean NOx trap catalysts." Catalysis Today 184, no. 1:2-7. PNNL-SA-84225. doi:10.1016/j.cattod.2011.11.024
• Kwak J., D. Kim, J. Szanyi, S. Cho, and C.H. Peden. 2012. "Enhanced high temperature performance of MgAl2O4-supported Pt-BaO lean NOx trap catalysts." Topics in Catalysis 55, no. 1-2:70-77. PNNL-SA-84224. doi:10.1007/s11244-012-9779-1
• Kwak J., D.N. Tran, J. Szanyi, C.H. Peden, and J.H. Lee. 2012. "The Effect of Copper Loading on the Selective Catalytic Reduction of Nitric Oxide by Ammonia Over Cu-SSZ-13." Catalysis Letters 142, no. 3:295-301. PNNL-SA-83565. doi:10.1007/s10562-012-0771-y
• Kwak J., D.N. Tran, S.D. Burton, J. Szanyi, J.H. Lee, and C.H. Peden. 2012. "Effects of Hydrothermal Aging on NH3-SCR reaction over Cu/zeolites." Journal of Catalysis 287, no. 1:203-209. PNNL-SA-81754. doi:10.1016/j.jcat.2011.12.025
• Kwak J., H. Zhu, J.H. Lee, C.H. Peden, and J. Szanyi. 2012. "Two different cationic positions in Cu-SSZ-13?." Chemical Communications 48, no. 39:4758-4760. PNNL-SA-85578. doi:10.1039/C2CC31184D
• 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
• Mudiyanselage K.K., and J. Szanyi. 2012. "NO2 uptake under practically relevant conditions on BaO/Pt(111)." Catalysis Today 181, no. 1:116-123. PNNL-SA-85709. doi:10.1016/j.cattod.2011.05.033
• Muntean G.G., M.N. Devarakonda, F. Gao, J. Kwak, J. Luo, C.H. Peden, and M.L. Stewart, et al. 2012. "CLEERS Aftertreatment Modeling and Analysis." In Advanced Combustion Engine Research and Development 2012 Annual Progress Report, edited by G Singh. III-3 - III-7. Washington Dc:U.S. Department of Energy. PNNL-22065.
• Szanyi J., M. Daturi, G. Clet, D.R. Baer, and C.H. Peden. 2012. "Well-studied Cu-BTC still serves surprises: evidence for facile Cu2+/Cu+ interchange." Physical Chemistry Chemical Physics. PCCP 14, no. 13:4383-4390. PNNL-SA-84481. doi:10.1039/c2cp23708c
• Yezerets A., C.H. Peden, J. Szanyi, I. Nova, and B. Epling. 2012. "Preface: Special Issue on Catalytic Control of Lean-Burn Engine Exhaust Emissions." Catalysis Today 184, no. 1:1. PNNL-SA-85829. doi:10.1016/j.cattod.2012.02.011

2011

• Du Y., D. Kim, T. Varga, Z. Wang, J. Szanyi, and I. Lyubinetsky. 2011. "Formation of single-phase BaO nanoclusters." Thin Solid Films 519, no. 16:5335-5338. PNNL-SA-76712. doi:10.1016/j.tsf.2011.02.032
• Kwak J., C.H. Peden, and J. Szanyi. 2011. "Using a surface-sensitive chemical probe and a bulk structure technique to monitor the ?- to ?-Al2O3 phase transformation." Journal of Physical Chemistry C 115, no. 25:12575-12579. PNNL-SA-79213. doi:10.1021/jp203541a
• Kwak J., D. Mei, C.H. Peden, R.J. Rousseau, and J. Szanyi. 2011. "(100) facets of ?-Al2O3: the active surfaces for alcohol dehydration reactions." Catalysis Letters 141, no. 5:649-655. PNNL-SA-69598. doi:10.1007/s10562-010-0496-8
• Kwak J., R.J. Rousseau, D. Mei, C.H. Peden, and J. Szanyi. 2011. "The Origin of Regioselectivity in 2-butanol Dehydration on Solid Acid Catalysts." ChemCatChem 3, no. 10:1557-1561. PNNL-SA-79781.
• Mudiyanselage K., C. Yi, C. Yi, and J. Szanyi. 2011. "Reactions of NO2 with BaO/Pt(111) Model Catalysts: The Effects of BaO Film Thickness and NO2 Pressure on the Formation of Ba(NOx)2 Species." Physical Chemistry Chemical Physics. PCCP 13, no. 23:11016-11026. PNNL-SA-77081.
• Mudiyanselage K., J.F. Weaver, and J. Szanyi. 2011. "Catalytic decomposition of Ba(NO3)2 on Pt(111)." Journal of Physical Chemistry C 115, no. 13:5903-5909. PNNL-SA-76855.
• Wang X., D. Kim, J. Kwak, C.M. Wang, J. Szanyi, and C.H. Peden. 2011. "Effect of reductive treatments on Pt behavior and NOx storage in lean NOx trap catalysts." Catalysis Today 175, no. 1:78- 82. PNNL-SA-79182. doi:10.1016/j.cattod.2011.03.032

2010

• Boily J.F., P.L. Gassman, T. Peretyazhko, J. Szanyi, and J.M. Zachara. 2010. "FTIR Spectral Components of Schwertmannite." Environmental Science & Technology 44, no. 4:1185-1190. PNNL-SA-71223.
• Henderson M.A., C.H. Peden, J.A. Rodriguez, J. Szanyi, J.T. Yates, and F. Zaera. 2010. "Preface to the Festschrift in Honor of Professor D. Wayne Goodman." Journal of Physical Chemistry C 114, no. 40:16861-16862. PNNL-SA-75566. doi:10.1021/jp105968e
• Kwak J., R.G. Tonkyn, D. Kim, J. Szanyi, and C.H. Peden. 2010. "Excellent activity and selectivity of Cu-SSZ-13 in the selective catalytic reduction of NOx with NH3." Journal of Catalysis 275, no. 2:187-190. PNNL-SA-73441. doi:10.1016/j.jcat.2010.07.031
• Mei D., J. Kwak, J. Szanyi, Q. Ge, and C.H. Peden. 2010. "Catalyst Size and Morphological Effects on the Interaction of NO2 with BaO/?-Al2O3 Materials." Catalysis Today 151, no. 3-4:304-313. PNNL-SA-68739. doi:10.1016/j.cattod.2010.01.005
• Mei D., J. Kwak, J.Z. Hu, S. Cho, J. Szanyi, L. Allard, and C.H. Peden. 2010. "The Unique Role of Anchoring Penta-coordinated Al3+ Sites in the Sintering of ? Al2O3-supported Pt Catalysts." The Journal of Physical Chemistry Letters 1. PNNL-SA-71486. doi:10.1021/jz101073p
• Mudiyanselage K., C. Yi, C. Yi, and J. Szanyi. 2010. "Reactions of NO2 with Ba(OH)2 on Pt(111)." Journal of Physical Chemistry C 114, no. 40:16955-16963. PNNL-SA-71210.
• Mudiyanselage K., D. Mei, C. Yi, C. Yi, J.F. Weaver, and J. Szanyi. 2010. "Formation, characterization and reactivity of adsorbed oxygen on BaO/Pt(111)." Journal of Physical Chemistry C 114, no. 47:20195-20206. PNNL-SA-76903.

2009

• Devarakonda M.N., D. Kim, J. Kwak, J.H. Lee, C.H. Peden, M.L. Stewart, and J. Szanyi, et al. 2009. "CLEERS Aftertreatment Modeling and Analysis." In FY 2009 Progress Report for Advanced Combustion Engine Research and Development. 155-163. Washington, D.C.:Energy Efficiency and Renewable Energy. PNNL-SA-69246.
• Kim D., J. Kwak, J. Szanyi, X. Wang, G. Li, J.C. Hanson, and C.H. Peden. 2009. "Characteristics of Desulfation Behavior for Pre-Sulfated Pt-BaO/CeO2 Lean NOx Trap Catalysts: The Role of the CeO2 Support." Journal of Physical Chemistry C 113, no. 50:21123-21129. PNNL-SA-67217. doi:10.1021/jp9062548
• Kim D., J. Kwak, J. Szanyi, X. Wang, M.H. Engelhard, and C.H. Peden. 2009. "Promotional effect of CO2 on desulfation processes for pre-sulfated Pt BaO/Al2O3 lean NOx trap catalysts." Topics in Catalysis 52, no. 13-20:1719-1722. PNNL-SA-64161. doi:10.1007/s11244-009-9328-8
• Kim D., J. Szanyi, J. Kwak, X. Wang, J.C. Hanson, M.H. Engelhard, and C.H. Peden. 2009. "Effects of sulfation level on the desulfation behavior of pre-sulfated Pt BaO/Al2O3 lean NOx trap catalysts: a combined H2 Temperature-Programmed Reaction, in-situ sulfur K-edge X-ray Absorption Near-Edge Spectroscopy, X-ray Photoelectron Spectroscopy, and Time-Resolved X-ray Diffraction Study." Journal of Physical Chemistry C 113, no. 17:7336-7341. PNNL-SA-64098. doi:10.1021/jp900304h
• Kwak J., D. Mei, C.W. Yi, D. Kim, C.H. Peden, L. Allard, and J. Szanyi. 2009. "Understanding the nature of surface nitrates in BaO/gamma-Al2O3 NOx storage materials: A combined experimental and theoretical study." Journal of Catalysis 261, no. 1:17-22. PNNL-SA-60222.
• Kwak J., J.Z. Hu, D. Mei, C.W. Yi, D. Kim, C.H. Peden, and L. Allard, et al. 2009. "Coordinatively unsaturated Al3+ centers as binding sites for active catalyst phases on ?-Al2O3." Science 325, no. 5948:1670-1673. PNNL-SA-67165. doi:10.1126/science.1176745
• Mei D., Q. Ge, J. Kwak, D. Kim, C.M. Verrier, J. Szanyi, and C.H. Peden. 2009. "Characterization of Surface and Bulk Nitrates of ?-Al2O3-Supported Alkaline Earth Oxides using Density Functional Theory." Physical Chemistry Chemical Physics. PCCP 11, no. 18:3380-3389. PNNL-SA-63194. doi:10.1039/b819347a
• Mei D., Q. Ge, J. Szanyi, and C.H. Peden. 2009. "First-principles Analysis of NOx Adsorption on Anhydrous ?-Al2O3 Surfaces." Journal of Physical Chemistry C 113, no. 18:7779-7789. PNNL-SA-63583. doi:10.1021/jp8103563
• Mudiyanselage K., C. Yi, C. Yi, and J. Szanyi. 2009. "Oxygen Coverage Dependence of NO Oxidation on Pt(111)." Journal of Physical Chemistry C 113, no. 14:5766-5776. PNNL-SA-64068.
• Mudiyanselage K., C.W. Yi, and J. Szanyi. 2009. "Reactivity of a Thick BaO Film Supported on Pt(111): Adsorption and Reaction of NO2, H2O and CO2." Langmuir 25, no. 18:10820-10828. PNNL-SA-65964. doi:10.1021/la901371g
• Nachimuthu P., Y. Kim, S.N. Kuchibhatla, Z. Yu, W. Jiang, M.H. Engelhard, and V. Shutthanandan, et al. 2009. "Growth and characterization of barium oxide nanoclusters on YSZ(111)." Journal of Physical Chemistry C 113, no. 32:14324-14328. PNNL-SA-65149. doi:10.1021/jp9020068
• Yi C., C. Yi, and J. Szanyi. 2009. "Interaction of D2O with a Thick BaO Film: Formation of and Phase Transitions in Barium Hydroxides." Journal of Physical Chemistry C 113, no. 35:15692-15697. PNNL-SA-67166.
• Yi C.W., and J. Szanyi. 2009. "BaO/Al2O3/NiAl(110) Model NOx Storage Materials: the effect of BaO film thickness on the amorphous-to-crystalline Ba(NO3)2 phase transition." Journal of Physical Chemistry C 113, no. 2:716-723. PNNL-SA-62867.
• Yi C.W., and J. Szanyi. 2009. "Reaction of NO2 with a pure, thick BaO film: the effect of temperature on the nature of NOx species formed." Journal of Physical Chemistry C 113, no. 6:2134-2140. PNNL-SA-62106.

2008

• Epling W.S., C.H. Peden, and J. Szanyi. 2008. "Carbonate Formation and Stability on a Pt/BaO/?-Al2O3 NOx Storage/Reduction Catalyst." Journal of Physical Chemistry C 112, no. 29:10952-10959. PNNL-SA-58726. doi:10.1021/jp712180q
• Kim D., J. Kwak, J. Szanyi, S. Cho, and C.H. Peden. 2008. "Roles of Pt and BaO in the Sulfation of Pt/BaO/Al2O3 Lean NOx Trap Materials: Sulfur K-edge XANES and Pt LIII XAFS Studies." Journal of Physical Chemistry C 112, no. 8:2981-2987. PNNL-SA-57316. doi:10.1021/jp077563i
• Kwak J., D. Kim, J. Szanyi, and C.H. Peden. 2008. "Excellent Sulfur Resistance of Pt/BaO/CeO2 Lean NOx Trap Catalysts." Applied Catalysis. B, Environmental 84, no. 3-4:545-551. PNNL-SA-59053. doi:10.1016/j.apcatb.2008.05.009
• Kwak J., J. Hu, A.C. Lukaski, D. Kim, J. Szanyi, and C.H. Peden. 2008. "The Role of PentaCoordinated Al3+ Ions in the High Temperature Phase Transformation of ?-Al2O3." Journal of Physical Chemistry C 112, no. 25:9486-9492. PNNL-SA-58543. doi:10.1021/jp802631u
• Mei D., Q. Ge, J. Kwak, D. Kim, J. Szanyi, and C.H. Peden. 2008. "Adsorption and Formation of BaO Overlayers on Gamma-Al2O3 Surfaces." Journal of Physical Chemistry C 112, no. 46:18050-18060. PNNL-SA-61350. doi:10.1021/jp806212z
• Ozensoy E., D.R. Herling, and J. Szanyi. 2008. "NOx Reduction on a Transition Metal-free ?-Al2O3 Catalyst Using Dimethylether (DME)." Catalysis Today 136, no. 1-2:46-54. PNNL-SA-56943.
• Yang Y., C.A. Mims, R.S. Disselkamp, D. Mei, J. Kwak, J. Szanyi, and C.H. Peden, et al. 2008. "Isotope effects in methanol synthesis and the reactivity of copper formates on a Cu/SiO2 catalyst." Catalysis Letters 125, no. 3-4:201-208. PNNL-SA-60424. doi:10.1007/s10562-008-9592-4

2007

• Boily J.F., J. Szanyi, and A.R. Felmy. 2007. "Effects of surface coordination on the temperature-programmed desorption of oxalate from goethite." Journal of Physical Chemistry C 111, no. 45:17072-17081. PNNL-SA-55303. doi:10.1021/jp075576q
• Hibbitts C.A., and J. Szanyi. 2007. "Physisorption of CO2 on non-ice materials relevant to icy satellites." Icarus 191, no. 1:371-380. PNNL-SA-58793. doi:10.1016/j.icarus.2007.04.012
• Kim D., J. Kwak, J. Szanyi, S.D. Burton, and C.H. Peden. 2007. "Water-induced Bulk Ba(NO3)2 Formation From NO2 Exposed Thermally Aged BaO/Al2O3." Applied Catalysis. B, Environmental 72, no. 3-4:233-239. PNNL-SA-50942.
• Kwak J., J. Hu, D. Kim, J. Szanyi, and C.H. Peden. 2007. "Penta-coordinated Al3+ ions as preferential nucleation sites for BaO on ?-Al2O3: an ultra-high magnetic field 27Al MAS NMR study." Journal of Catalysis 251, no. 2:189-194. PNNL-SA-54213. doi:10.1016/j.jcat.2007.06.029
• Szanyi J., J. Kwak, D. Kim, X. Wang, J. Hanson, R.J. Chimentao, and C.H. Peden. 2007. "Water-induced morphology changes in BaO/?-Al2O3 NOx storage materials." Chemical Communications 2007, no. 9:984-986. PNNL-SA-53004. doi:10.1039/b613674e
• Szanyi J., J. Kwak, D. Kim, X. Wang, R.J. Chimentao, J. Hanson, and W.S. Epling, et al. 2007. "Water-induced morphology changes in BaO/?-Al2O3 NOx storage materials: an FTIR, TPD, and time-resolved synchrotron XRD study." Journal of Physical Chemistry C 111, no. 12:4678-4687. PNNL-SA-53005. doi:10.1021/jp067932v
• Szanyi J., J. Kwak, R.J. Chimentao, and C.H. Peden. 2007. "The effect of H2O on the adsorption of NO2 on ?-Al2O3: an in situ FTIR/MS study." Journal of Physical Chemistry C 111, no. 6:2661-2669. PNNL-SA-53003. doi:10.1021/jp066326x
• Yi C.W., and J. Szanyi. 2007. "D2O Adsorption on an Ultrathin Alumina Film on NiAl(110)." Journal of Physical Chemistry C 111, no. 47:17597-17602. PNNL-SA-56155. doi:10.1021/jp074459s
• Yi C.W., J. Kwak, and J. Szanyi. 2007. "The interaction of NO2 with BaO: from cooperative adsorption to Ba(NO3)2 formation." Journal of Physical Chemistry C 111, no. 42:15299-15305. PNNL-SA-55156. doi:10.1021/jp074179c
• Yi C.W., J. Kwak, C.H. Peden, C.M. Wang, and J. Szanyi. 2007. "Understanding Practical Catalysts Using a Surface Science Approach: The Importance of Strong Interaction between BaO and Al2O3 in NOx Storage Materials." Journal of Physical Chemistry C 111, no. 41:14942-14944. PNNL-SA-55982. doi:10.1021/jp0763376

2006

• Boily J.F., J. Szanyi, and A.R. Felmy. 2006. "A Combined FTIR and TPD Study on the Bulk and Surface Dehydroxylation and Decarbonation of Synthetic Goethite." Geochimica et Cosmochimica Acta 70, no. 14:3613-3624. PNNL-SA-47156.
• Kim D., J. Szanyi, J. Kwak, T. Szailer, J. Hanson, C.M. Wang, and C.H. Peden. 2006. "Effect of Barium Loading on the Desulfation of Pt-BaO/Al2O3 Studied by H2 TPRX, TEM, Sulfur K-edge XANES, and in Situ TR-XRD." Journal of Physical Chemistry B 110, no. 21:10441-10448. PNNL-SA-47920. doi:10.1021/jp060119f
• Kwak J., C.H. Peden, and J. Szanyi. 2006. "Non-thermal plasma-assisted NOx reduction over Na-Y zeolites: The promotional effect of acid sites." Catalysis Letters 109, no. 1-2:1-6. PNNL-SA-48145. doi:10.1007/s10562-006-0049-3
• Kwak J., D. Kim, T. Szailer, C.H. Peden, and J. Szanyi. 2006. "NOx Uptake Mechanism on Pt/BaO/Al2O3 Catalysts." Catalysis Letters 111, no. 3-4:119-126. PNNL-SA-52340.
• Ozensoy E., C.H. Peden, and J. Szanyi. 2006. "Ba Deposition and Oxidation on ?-Al2O3/NiAl(100) Ultrathin Films. Part I: Anaerobic Deposition Conditions." Journal of Physical Chemistry 110. PNNL-SA-48356. doi:10.1021/jp060668l
• Ozensoy E., C.H. Peden, and J. Szanyi. 2006. "Ba Deposition and Oxidation on ?-Al2O3/NiAl(100) ultrathin films. Part II: O2(g) assisted Ba oxidation." Journal of Physical Chemistry B 110, no. 34:17009-17014. PNNL-SA-48311. doi:10.1021/jp060669d
• Ozensoy E., C.H. Peden, and J. Szanyi. 2006. "Low Temperature H2O and NO2 Coadsorption on ?-Al2O3/NiAl(100) ultrathin films." Journal of Physical Chemistry B 110, no. 15:8025-8034. PNNL-SA-47854. doi:10.1021/jp057534c
• Ozensoy E., C.H. Peden, and J. Szanyi. 2006. "Model NOx storage systems: Storage capacity and thermal aging of BaO/theta- Al2O3/NiAl(100)." Journal of Catalysis 243, no. 1:149-157. PNNL-SA-54616. doi:10.1016/j.jcat.2006.06.028
• Szailer T., J. Kwak, D. Kim, J. Hanson, C.H. Peden, and J. Szanyi. 2006. "Reduction of Stored NOx on Pt/Al2O3 and Pt/BaO/Al2O3 Catalysts with H2 and CO." Journal of Catalysis 239, no. 1:51-64. PNNL-SA-46078. doi:10.1016/j.jcat.2006.01.014
• Szailer T., J. Kwak, D. Kim, J. Szanyi, C.M. Wang, and C.H. Peden. 2006. "Effects of Ba loading and calcination temperature on BaAl2O4 formation for BaO/Al2O3 NOx Storage and Reduction Catalysts." Catalysis Today 114, no. 1:86-93. PNNL-SA-47049. doi:10.1016/j.cattod.2006.02.016
• Szanyi J., J. Kwak, S.D. Burton, J.A. Rodriguez, and C.H. Peden. 2006. "Characterization of NOx Species in Dehydrated and Hydrated Na- and Ba-Y, FAU Zeolites Formed in NO2 Adsorption." Journal of Electron Spectroscopy and Related Phenomena 150, no. 2-3:164-170. PNNL-SA-42646. doi:10.1016/j.elspec.2005.05.007
• Wang C.M., J. Kwak, D. Kim, J. Szanyi, R. Sharma, S. Thevuthasan, and C.H. Peden. 2006. "Morphological Evolution of Ba(NO3)2 Supported on ?-Al2O3(0001): An In-Situ TEM Study." Journal of Physical Chemistry B 110, no. 24:11878-11883. PNNL-SA-47973. doi:10.1021/jp060235i
• Yang Y., R.S. Disselkamp, J. Szanyi, C.H. Peden, C.T. Campbell, and J.G. Goodwin Jr. 2006. "Design and operating characteristics of a transient kinetic analysis catalysis reactor system employing in situ transmission Fourier transform infrared." Review of Scientific Instruments 77, no. 9:Art. No. 094104. PNNL-SA-50083.

2005

• Kim D., Y. Chin, J. Kwak, J. Szanyi, and C.H. Peden. 2005. "Changes in Ba phases in BaO/Al2O3 upon thermal aging and H2O treatment." Catalysis Letters 105, no. 3-4:259-268. PNNL-SA-46402. doi:10.1007/s10562-005-8700-y
• Kwak J., D. Kim, J. Szanyi, T. Szailer, and C.H. Peden. 2005. "Reactivity of Pt/BaO/Al2O3 for NOx Storage/Reduction: Effects of Pt and Ba Loading." In 229th ACS National Meeting, San Diego, March 13-17, 2005, Book of Abstracts, 229, Fuel 163. Washington Dc:American Chemical Society. PNNL-SA-44157.
• Ozensoy E., C.H. Peden, and J. Szanyi. 2005. "NO2 Adsorption on Ultrathin T-Al2O3 Films: Formation of Nitrite and Nitrate Species." Journal of Physical Chemistry 109, no. 33:15977-15984. PNNL-SA-45049.
• Ozensoy E., J. Szanyi, and C.H. Peden. 2005. "Interaction of Water with Ordered Theta-Al203 Ultrathin Films grown on NiAl(100)." Journal of Physical Chemistry B 109, no. 8:3431-3436. PNNL-SA-44490. doi:10.1021/jp0449206
• Szanyi J. 2005. "Nature of Nitrate Species on BaO/Al2O3 NSR Catalysts." In 229th ACS National Meeting Book of Abstracts, 229, Fuel 160. District Of Columbia:American Chemical Society. PNNL-SA-44184.
• Szanyi J., J. Kwak, and C.H. Peden. 2005. "The Catalytic Chemistry of HCN+NO2 over Na- and Ba-Y, FAU: An In Situ FTIR and TPD/TPR Study." Journal of Physical Chemistry B 109, no. 4:1481-1490. PNNL-SA-42861. doi:10.1021/jp045671o
• Szanyi J., J. Kwak, D. Kim, S.D. Burton, and C.H. Peden. 2005. "NO2 Adsorption on BaO/Al2O3: The Nature of Nitrate Species." Journal of Physical Chemistry B 109, no. 1:27-29. PNNL-SA-42873. doi:10.1021/jp045082i
• Szanyi J., J. Kwak, J. Hanson, C.M. Wang, T. Szailer, and C.H. Peden. 2005. "Changing Morphology of BaO/AI2O3 during NO2 Uptake and Release." Journal of Physical Chemistry B 109, no. 15:7339-7344. PNNL-SA-43787.

2004

• Barlow S.E., J. Kwak, C.H. Peden, J. Szanyi, R.G. Tonkyn, G. Singh, and K. Stork, et al. 2004. "Plasma Catalysis for NOx Reduction from Light-Duty Diesel Vehicles." In Advanced Combustion Engine R&D: 2003 Annual Progress Report, edited by G Singh. 129-136. Washington, Dc:Department of Energy. PNNL-SA-41975.
• Barlow S.E., J. Kwak, C.H. Peden, J. Szanyi, R.G. Tonkyn, K. Howden, and J.W. Hoard, et al. 2004. "Plasma Catalysis for NOx Reduction from Light-Duty Diesel Vehicles." In Advanced Combustion Engine Research & Development, 2004 Annual Progress Report. 180-183. Washington Dc:US Department of Energy, Energy Efficiency and Renewable Energy. PNNL-14926.
• Kwak J., J. Szanyi, and C.H. Peden. 2004. "Non-Thermal Plasma-assisted NOx Reduction over Alkali and Alkaline Earth Ion Exchanged Y, FAU Zeolites." Catalysis Today 89, no. 1-2:135-141. PNNL-SA-38276.
• Peden C.H., J. Szanyi, M.A. Henderson, S.A. Chambers, E. Ozensoy, S. Azad, and J.A. Rodriguez, et al. 2004. "Fundamental Studies of Selectivity and Mechanisms of Oxide-Catalyzed Nitrogen Oxide Chemistry." In Frontiers in Catalysis Science: Proceedings of the 12th DOE/BES Heterogeneous Catalysis & Surface Science Meeting, 393-396. Washington, Dc:Department of Energy, Office of Basic Energy Sciences, Chemical Sciences. PNWD-SA-6558.
• Szanyi J., J. Kwak, and C.H. Peden. 2004. "The Effect of Water on the Adsorption of NO2 in Na- and Ba-Y,FAU Zeolites: A Combined FTIR and TPD Investigation." Journal of Physical Chemistry B 108, no. 12:3746-3753. PNNL-SA-40064.
• Szanyi J., J. Kwak, R.A. Moline, and C.H. Peden. 2004. "Adsorption, Coadsorption and Reaction of Acetaldehyde and NO2 on Na-Y,FAU: an in situ FTIR Investigation." Journal of Physical Chemistry B 108, no. 44:17050-17058. PNNL-SA-41609.
• Wang X., J. Hanson, J. Szanyi, and J.A. Rodriguez. 2004. "Interaction of H2O and NO2 with BaY Faujasite: Complex Contraction/Expansion Behavior of the Zeolite Unit Cell." Journal of Physical Chemistry B. PNNL-SA-42568.
• White J.M., J. Szanyi, and M.A. Henderson. 2004. "Thermal Chemistry of Trimethyl Acetic Acid on TiO2(110)." Journal of Physical Chemistry B 108, no. 11:3592-3602. PNNL-SA-40464.

2003

• Azad S., J. Szanyi, C.H. Peden, and L.Q. Wang. 2003. "Adsorption and Reaction of NO on Oxidized and Reduced SrTiO3 (100) Surfaces." Journal of Vacuum Science and Technology A--Vacuum, Surfaces and Films 21, no. 4:1307-1311. PNNL-SA-37906.
• Henderson M.A., J. Szanyi, and C.H. Peden. 2003. "Conversion of N2O to N?² on TiO2 (110)." Catalysis Today 85 (2-4). PNNL-SA-38082.
• Kwak J., J. Szanyi, and C.H. Peden. 2003. "Non-thermal Plasma-Assisted Catalytic NOx Reduction over Ba-Y,FAU: The Effect of Catalyst Preparation." Journal of Catalysis 220, no. 2:291-298. PNNL-SA-41341.
• Szanyi J., J. Kwak, R.A. Moline, and C.H. Peden. 2003. "The Adsorption of NO2 and the NO+O?² Reaction on Na-Y,FAU: an in situ FTIR Investigation." Physical Chemistry Chemical Physics. PCCP 5, no. 18:4045-4051. PNNL-SA-38858.
• White J.M., J. Szanyi, and M.A. Henderson. 2003. "The Photon-Driven Hydrophilicity of Titania: A Model Study Using TiO2(110) and Adsorbed Trimethyl acetate." Journal of Physical Chemistry B 107, no. 34:9029-9033. PNNL-SA-38444.