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Fundamental and Computational Sciences Directorate

Staff information

Abhi Karkamkar

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

PNNL Publications


  • Chen L., Y. Zhu, L. Meyer, L.V. Hale, T.D. Le, A.J. Karkamkar, and J.A. Lercher, et al. 2022. "Effect of Reaction Conditions on the Hydrogenolysis of Polypropylene and Polyethylene into Gas and Liquid Alkanes." Reaction Chemistry & Engineering 7, no. 4:844-854. PNNL-SA-170008. doi:10.1039/d1re00431j


  • Beck C.L., B.J. Riley, S. Chong, A.J. Karkamkar, D.R. Seiner, and S.B. Clark. 2021. "Molecular Iodine Interactions with Metal Substrates: Towards the Understanding of Iodine Interactions in the Environment Following a Nuclear Accident." Journal of Nuclear Materials 546. PNNL-SA-153020. doi:10.1016/j.jnucmat.2020.152771
  • Giustra Z.X., G. Chen, M. Vasiliu, A.J. Karkamkar, S. Autrey, D.A. Dixon, and S. Liu. 2021. "A Comparison of Hydrogen Release Kinetics from 5- and 6-membered 1,2-BN-Cycloalkanes." RSC Advances 11, no. 54:34132-34136. PNNL-SA-165680. doi:10.1039/D1RA07477F
  • Sanyal U., K. Koh, L. Meyer, A.J. Karkamkar, and O.Y. Gutierrez-Tinoco. 2021. "Simultaneous electrocatalytic hydrogenation of aldehydes and phenol over carbon-supported metals." Journal of Applied Electrochemistry 51, no. 1:27-36. PNNL-SA-155530. doi:10.1007/s10800-020-01464-7
  • Sanyal U., S.F. Yuk, K. Koh, M. Lee, K. Stoerzinger, D. Zhang, and L. Meyer, et al. 2021. "Hydrogen bonding enhances the electrochemical hydrogenation of benzaldehyde in the aqueous phase." Angewandte Chemie International Edition 60, no. 1:290-296. PNNL-SA-155228. doi:10.1002/anie.202008178


  • Akhade S.A., N. Singh, O.Y. Gutierrez-Tinoco, J.A. Lopez-Ruiz, H. Wang, J.D. Holladay, and Y. Liu, et al. 2020. "Electrocatalytic Hydrogenation of Biomass-Derived Organics: A review." Chemical Reviews 120, no. 20:11370-11419. PNNL-SA-155470. doi:10.1021/acs.chemrev.0c00158
  • Andrews E.M., J.A. Lopez-Ruiz, J.D. Egbert, K. Koh, U. Sanyal, M. Song, and D. Li, et al. 2020. "Performance of base and noble metals for electrocatalytic hydrogenation of bio-oil-derived oxygenated compounds." ACS Sustainable Chemistry & Engineering 8, no. 11:4407-4418. PNNL-SA-149793. doi:10.1021/acssuschemeng.9b07041
  • Bowden M.E., B. Ginovska, M.O. Jones, A.J. Karkamkar, A.J. Ramirez-Cuesta, L.L. Daemen, and G.K. Schenter, et al. 2020. "Heterolytic Scission of Hydrogen Within a Crystalline Frustrated Lewis Pair." Inorganic Chemistry 59, no. 20:15295-15301. PNNL-SA-154933. doi:10.1021/acs.inorgchem.0c02290
  • Koh K., U. Sanyal, M. Lee, G. Cheng, M. Song, V. Glezakou, and Y. Liu, et al. 2020. "Electrochemically tunable proton-coupled electron transfer in Pd-catalyzed benzaldehyde hydrogenation." Angewandte Chemie International Edition 59, no. 4:1501-1505. PNNL-SA-144918. doi:10.1002/anie.201912241
  • Nayyar I.H., B. Ginovska, A.J. Karkamkar, T. Gennett, and S. Autrey. 2020. "Physi-sorption of H2 on pure and boron-doped graphene monolayers: A dispersion-corrected DFT study." C: Journal of Carbon Research 6, no. 1:Article No. 15. PNNL-SA-147004. doi:10.3390/c6010015


  • Chen Y., N.M. Washton, R.P. Young, A.J. Karkamkar, J.J. De Yoreo, and K.T. Mueller. 2019. "Monitoring solvent dynamics and ion associations in the formation of cubic octamer polyanion in tetramethylammonium silicate solutions." Physical Chemistry Chemical Physics 21, no. 9:4717-4720. PNNL-SA-141469. doi:10.1039/C8CP07521B
  • Kumar R., A.J. Karkamkar, M.E. Bowden, and S. Autrey. 2019. "Solid state hydrogen rich boron-nitrogen compounds for energy storage." Chemical Society Reviews 48, no. 21:5350-5380. PNNL-SA-146182. doi:10.1039/c9cs00442d
  • Lopez-Ruiz J.A., E.M. Andrews, S.A. Akhade, M. Lee, K. Koh, U. Sanyal, and S.F. Yuk, et al. 2019. "Understanding the role of metal and molecular structure on the electrocatalytic hydrogenation of oxygenated organic compounds." ACS Catalysis 9, no. 11:9964-9972. PNNL-SA-145115. doi:10.1021/acscatal.9b02921
  • Malhotra D., D. Cantu Cantu, P.K. Koech, D.J. Heldebrant, A.J. Karkamkar, F. Zheng, and M.D. Bearden, et al. 2019. "Directed Hydrogen Bond Placement: Low Viscosity Amine Solvents for CO2 Capture." ACS Sustainable Chemistry & Engineering 7, no. 8:7535-7542. PNNL-SA-139613. doi:10.1021/acssuschemeng.8b05481
  • Polikarpov E., C.A. Fernandez, G.W. Coffey, S.K. Nune, A.J. Karkamkar, B.J. Garcia, and T.L. Lemmon, et al. 2019. "Toward Polarization-Switched Molecular Pumps." ACS Applied Energy Materials 2, no. 6:4092-4097. PNNL-SA-138089. doi:10.1021/acsaem.9b00252
  • Yu Y., T. He, A. Wu, Q. Pei, A.J. Karkamkar, S. Autrey, and P. Chen. 2019. "Reversible hydrogen uptake/release over sodium phenoxide-cyclohexanolae pair." Angewandte Chemie International Edition 58, no. 10:3102-3107. PNNL-SA-132154. doi:10.1002/anie.201810945


  • Allendorf M.D., Z. Hulvey, T. Gennett, A. Alauddin, S. Autrey, J. Camp, and E. Cho, et al. 2018. "An Assessment of Strategies for the Development of Solid-State adsorbents for Vehicular Hydrogen Storage." Energy and Environmental Science 11, no. 10:2784-2812. PNNL-SA-132915. doi:10.1039/c8ee01085d


  • Malhotra D., J.P. Page, M.E. Bowden, A.J. Karkamkar, D.J. Heldebrant, V. Glezakou, and R.J. Rousseau, et al. 2017. "Phase-Change Aminopyridines as Carbon Dioxide Capture Solvents." Industrial and Engineering Chemistry Research 56, no. 26:7534-7540. PNNL-SA-124645. doi:10.1021/acs.iecr.7b00874


  • Brooks K.P., M.E. Bowden, A.J. Karkamkar, A.Y. Houghton, and T. Autrey. 2016. "Coupling of Exothermic and Endothermic Hydrogen Storage Materials." Journal of Power Sources 324. PNNL-SA-113561. doi:10.1016/j.jpowsour.2016.05.067
  • Ramasamy K.K., M.J. Gray, H.M. Job, D.M. Santosa, X.S. Li, A. Devaraj, and A.J. Karkamkar, et al. 2016. "Role of Calcination Temperature on the Hydrotalcite Derived MgO-Al2O3 in Converting Ethanol to Butanol." Topics in Catalysis 59, no. 1:46-54. PNNL-SA-110874. doi:10.1007/s11244-015-0504-8
  • Whittemore S.M., M.E. Bowden, A.J. Karkamkar, K.K. Parab, D. Neiner, T. Autrey, and J.S. Ishisbashi, et al. 2016. "Blending materials composed of Boron, Nitrogen and Carbon to transform approaches to Liquid Hydrogen Stores." Dalton Transactions 45, no. 14:6196-6203. PNNL-SA-114404. doi:10.1039/C5DT04276C


  • Chen G., L.N. Zakharov, M.E. Bowden, A.J. Karkamkar, S.M. Whittemore, E.B. Garner, and T.C. Mikulas, et al. 2015. "Bis-BN Cyclohexane: A Remarkably Kinetically Stable Chemical Hydrogen Storage Material." Journal of the American Chemical Society 137, no. 1:134-137. PNNL-SA-107108. doi:10.1021/ja511766p
  • Choi Y., M.P. Westman, A.J. Karkamkar, J. Chun, and E. Ronnebro. 2015. "Synthesis and Engineering Materials Properties of Fluid Phase Chemical Hydrogen Storage Materials for Automotive Applications." Energy and Fuels 29, no. 10:6695-6703. PNNL-SA-111018. doi:10.1021/acs.energyfuels.5b01307
  • Schwenzer B., L. Cosimbescu, V.A. Glezakou, A.J. Karkamkar, Z. Wang, and R.S. Weber. 2015. "Use of Solvatochromism to Assay Preferential Solvation of a Prototypic Catalytic Site." Topics in Catalysis 58, no. 4-6:258-270. PNNL-SA-101069. doi:10.1007/s11244-015-0367-z


  • Choi Y., E. Ronnebro, S.D. Rassat, A.J. Karkamkar, G.D. Maupin, J.D. Holladay, and K.L. Simmons, et al. 2014. "Kinetics Study of Solid Ammonia Borane Hydrogen Release - Modeling and Experimental Validation for Chemical Hydrogen Storage." Physical Chemistry Chemical Physics. PCCP 16, no. 17:7959-7968. PNNL-SA-93992. doi:10.1039/C3CP55280B
  • 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.
  • Yadav M., J.C. Linehan, A.J. Karkamkar, E.F. Van Der Eide, and D.J. Heldebrant. 2014. "Homogeneous Hydrogenation of CO2 to Methyl Formate Utilizing Switchable Ionic Liquids." Inorganic Chemistry 53, no. 18:9849-9854. PNNL-SA-99647. doi:10.1021/ic501378w


  • Cantelli R., A. Paolone, O. Palumbo, O. Palumbo, F. Leardini, T. Autrey, and A.J. Karkamkar, et al. 2013. "Rotational dynamics in ammonia borane: Evidence of strong isotope effects." Journal of Alloys and Compounds 580, no. Supplement 1:S63-S66. PNNL-SA-100513. doi:10.1016/j.jallcom.2013.03.148
  • Karkamkar A.J., K. Parab, D.M. Camaioni, D. Neiner, H.M. Cho, T.K. Nielsen, and T. Autrey. 2013. "A Thermodynamic and Kinetic Study of the Heterolytic Activation of Hydrogen by Frustrated Borane-Amine Lewis Pairs." Dalton Transactions 42, no. 3:615-619. PNNL-SA-89406. doi:10.1039/c2dt31628e
  • Luo W., D. Neiner, A.J. Karkamkar, K. Parab, E.B. Garner, D.A. Dixon, and D.W. Matson, et al. 2013. "3-Methyl-1,2-BN-Cyclopentane: A Promising H2 Storage Material?." Dalton Transactions 42, no. 3:611-614. PNNL-SA-89284. doi:10.1039/c2dt31617j
  • Nielsen T.K., A.J. Karkamkar, M.E. Bowden, F. Besenbacher, T.R. Jensen, and T. Autrey. 2013. "Methods to Stabilize and Destabilize Ammonium Borohydride." Dalton Transactions 42, no. 3:680-687. PNNL-SA-89183. doi:10.1039/C2DT31591B


  • Aijaz A., A.J. Karkamkar, Y. Choi, N. Tsumori, E. Ronnebro, T. Autrey, and H. Shioyama, et al. 2012. "Immobilizing Highly Catalytically Active Pt Nanoparticles inside the Pores of Metal-Organic Framework: A Double Solvents Approach." Journal of the American Chemical Society 134, no. 34:13926-13929. PNNL-SA-87806. doi:10.1021/ja3043905


  • Autrey T., M.E. Bowden, and A.J. Karkamkar. 2011. "Control of hydrogen release and uptake in amine borane molecular complexes: Thermodynamics of ammonia borane, ammonium borohydride, and the diammoniate of diborane." Faraday Discussions 151, no. 0:157-169. PNNL-SA-76789. doi:10.1039/C0FD00015A
  • Chong M., A.J. Karkamkar, T. Autrey, S. Orimo, S. Jalisatgi, and C.M. Jensen. 2011. "Reversible Dehydrogenation of Magnesium Borohydride to Magnesium Triborane in the Solid State Under Moderate Conditions." Chemical Communications 47, no. 4:1330-1332. PNNL-SA-74978. doi:10.1039/C0CC03461D
  • Liu W., Y. Rao, H. Wan, A.J. Karkamkar, J. Liu, and L.Q. Wang. 2011. "Bubbling Reactor Technology for Rapid Synthesis of Uniform, Small MFI-Type Zeolite Crystals." Industrial and Engineering Chemistry Research 50, no. 12:7241-7250. PNNL-SA-71857. doi:10.1021/ie102069z
  • Neiner D., A.J. Karkamkar, M. Bowden, Y. Choi, A.T. Luedtke, J.D. Holladay, and A.M. Fisher, et al. 2011. "Kinetic and Thermodynamic Investigation of Hydrogen Release from Ethane 1,2-di-amineborane." Energy & Environmental Science 4, no. 10:4187-4193. PNNL-SA-80269. doi:10.1039/C1EE01884A
  • Nurmi J., V. Sarathy, P.G. Tratnyek, D.R. Baer, J.E. Amonette, and A.J. Karkamkar. 2011. "Recovery of Iron/Iron Oxide Nanoparticles from Solution: Comparison of Methods and their Effects." Journal of Nanoparticle Research 13, no. 5:1937-1952. PNNL-SA-69948. doi:10.1007/s11051-010-9946-x


  • Bowden M.E., D.J. Heldebrant, A.J. Karkamkar, T.E. Proffen, G.K. Schenter, and T. Autrey. 2010. "The diammoniate of diborane: Crystal structure and hydrogen release." Chemical Communications 46, no. 45:8564-8566. PNNL-SA-74582. doi:10.1039/C0CC03249B
  • Chua Y., Y. Chua, G. Wu, Z. Xiong, Z. Xiong, A.J. Karkamkar, and J. Guo, et al. 2010. "Synthesis, Structure and Dehydrogenation of Magnesium Amidoborane Monoammoniate." Chemical Communications 46, no. 31:5752-5754. PNNL-SA-74419.
  • Kim H., A.J. Karkamkar, T. Autrey, P. Chupas, and T.E. Proffen. 2010. "Storing Hydrogen." In APs Science 2009, ANL-10/06. 48-49. Argonne, Illinois:Argonnen National Laboratory. PNNL-19252.
  • Neiner D., A.T. Luedtke, A.J. Karkamkar, W.J. Shaw, J. Wang, N. Browning, and T. Autrey, et al. 2010. "Decomposition Pathway of Ammonia Borane on the Surface of nano-BN." Journal of Physical Chemistry C 114, no. 32:13935-13941. PNNL-SA-72290.
  • Shaw W.J., M.E. Bowden, A.J. Karkamkar, C.J. Howard, D.J. Heldebrant, N.J. Hess, and J.C. Linehan, et al. 2010. "Characterization of a New Phase of Ammonia Borane." Energy & Environmental Science 3, no. 6:796-804. PNNL-SA-66903.


  • Karkamkar A.J., S.M. Kathmann, G.K. Schenter, D.J. Heldebrant, N.J. Hess, M.S. Gutowski, and T. Autrey. 2009. "Thermodynamic and Structural Investigations of Ammonium Borohydride, a Solid with a Highest Content of Thermodynamically and Kinetically Accessible Hydrogen." Chemistry of Materials 21, no. 19:4356-4358. PNNL-SA-62087. doi:10.1021/cm902385c
  • Kathmann S.M., V.M. Parvanov, G.K. Schenter, A.C. Stowe, L.L. Daemen, M.A. Hartl, and J.C. Linehan, et al. 2009. "Experimental and Computational Studies on Collective Hydrogen Dynamics in Ammonia Borane: Incoherent Inelastic Neutron Scattering." Journal of Chemical Physics 130, no. 2:article no. 024507. PNNL-SA-61178. doi:10.1063/1.3042270
  • Kim H., A.J. Karkamkar, T. Autrey, P. Chupas, and T.E. Proffen. 2009. "Determination of structure and phase transition of light element nanocomposites in mesoporous silica: case study of NH3BH3 in MCM-41." Journal of the American Chemical Society 131, no. 38:13749-13755. PNNL-SA-67171.
  • Neiner D., A.J. Karkamkar, J.C. Linehan, B.W. Arey, T. Autrey, and S.M. Kauzlarich. 2009. "Promotion of Hydrogen Release from Ammonia Borane with Mechanically Activated Hexagonal Boron Nitride." Journal of Physical Chemistry C 113, no. 3:1098-1103. PNNL-SA-62557. doi:10.1021/jp8087385
  • Paolone A., O. Palumbo, O. Palumbo, P. Rispoli, R. Cantelli, T. Autrey, and A.J. Karkamkar. 2009. "Absence of the structural phase transition in ammonia borane dispersed in mesoporous silica: evidence of novel thermodynamic properties." Journal of Physical Chemistry C 113, no. 24:10319-10321. PNNL-SA-65668.
  • Wang L.Q., A.J. Karkamkar, T. Autrey, and G.J. Exarhos. 2009. "Hyperpolarized Xe-129 NMR Investigation of Ammonia Borane in Mesoporous Silica." Journal of Physical Chemistry C 113, no. 16:6485-6490. PNNL-SA-63693.


  • Cho H.M., W.J. Shaw, V.M. Parvanov, G.K. Schenter, A.J. Karkamkar, N.J. Hess, and C.J. Mundy, et al. 2008. "Molecular Structure and Dynamics in the Low Temperature (Orthorhombic) Phase of NH3BH3." Journal of Physical Chemistry A 112, no. 18:4277-4283. PNNL-SA-58394.
  • Heldebrant D.J., A.J. Karkamkar, J.C. Linehan, and T. Autrey. 2008. "Synthesis of Ammonia Borane for Hydrogen Storage Applications." Energy & Environmental Science 1, no. 1:156-160. PNNL-SA-60960. doi:10.1039/b808865a
  • Heldebrant D.J., A.J. Karkamkar, J.C. Linehan, and T. Autrey. 2008. "Synthesis of Ammonia Borane for Hydrogen Storage Applications." Energy & Environmental Science 1, no. 1:156-160. PNNL-SA-61234.
  • Heldebrant D.J., A.J. Karkamkar, N.J. Hess, M.E. Bowden, S.D. Rassat, F. Zheng, and K.G. Rappe, et al. 2008. "The Effects of Chemical Additives on the Induction Phase in Solid-State Thermal Decomposition of Ammonia Borane." Chemistry of Materials 20, no. 16:5332-5336. PNNL-SA-60433. doi:10.1021/cm801253u
  • Hess N.J., M.R. Hartman, C. Brown, E. Mamontov, A.J. Karkamkar, D.J. Heldebrant, and L.L. Daemen, et al. 2008. "Quasielastic neutron scattering of -NH3 and -BH3 rotational dynamics in orthorhombic ammonia borane." Chemical Physics Letters 459, no. 1-6:85-88. PNNL-SA-58774. doi:10.1016/j.cplett.2008.04.130
  • Karkamkar A.J. 2008. Measurements of BET Surface Area on Silica Nanosprings. PNNL-17648. Richland, WA: Pacific Northwest National Laboratory. Measurements of BET Surface Area on Silica Nanosprings
  • Xiong Z., C.K. Yong, G. Wu, P. Chen, W.J. Shaw, A.J. Karkamkar, and T. Autrey, et al. 2008. "High-capacity hydrogen storage in lithium and sodium amidoboranes." Nature Materials 7, no. 2:138-141. PNNL-SA-54652. doi:10.1038/nmat2081
  • Xiong Z., Z. Xiong, Y. Chua, Y. Chua, G. Wu, W.L. Xu, and P. Chen, et al. 2008. "Interaction of Lithium Hydride and Ammonia Borane in THF." Chemical Communications 43. PNNL-SA-62842. doi:10.1039/b812576g


  • Karkamkar A.J., C.L. Aardahl, and T. Autrey. 2007. "Recent Developments on Hydrogen Release from Ammonia Borane." Material Matters 2, no. 2:6-9. PNNL-SA-53833.

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