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Energy and Environment Directorate

Ayman Karim

Ayman Karim

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 372-4186

Research Interests

  • Catalytic conversion of biomass to fuels and chemicals.
  • In-situ catalyst characterization by x-ray absorption spectroscopy.
  • Catalyst synthesis and characterization: structure and electronic properties of supported nanoparticles.
  • Colloidal nanoparticles synthesis and characterization.
  • Microreactor design for synthesis and catalytic applications.

Education and Credentials

  • Post-Doctoral Fellow, Chemical Engineering, University of Delaware, Newark, DE (2007/2008)
  • Ph.D., Chemical Engineering, University of New Mexico, Albuquerque, NM (2006)
  • M.S., Chemical Engineering, University of New Mexico, Albuquerque, NM (2003)
  • B.S., Biomedical Engineering, Cairo University, Cairo Egypt (2000)

Affiliations and Professional Service

Awards and Recognitions

  • Shane L. Anderson/Jay C. Dorius Outstanding Student Presentation Award, Western States Catalysis Club Meeting, Albuquerque, NM (2005)
  • Richard J. Kokes Student Travel Award, 19th North American Catalysis Society meeting, Philadelphia, PA (2005)

PNNL Publications


  • Liu C, AM Karim, VMC Lebarbier, D Mei, and Y Wang. 2013. "Vapor phase ketonization of acetic acid on ceria based metal oxides." Topics in Catalysis 56(18-20):1782-1789.  doi:10.1007/s11244-013-0114-2
  • Sun J, AM Karim, H Zhang, L Kovarik, XS Li, A Hensley, JS McEwen, and Y Wang. 2013. "Carbon-Supported bimetallic Pd-Fe catalysts for vapor-phase hydrodeoxygenation of guaiacol." Journal of Catalysis 306(1):47-57.  doi:10.1016/j.jcat.2013.05.020
  • Sun J, D Mei, AM Karim, AK Datye, and Y Wang. 2013. "Minimizing the formation of coke and methane on Co nanoparticles in steam reforming of biomass-derived oxygenates." ChemCatChem 5(6):1299-1303.  doi:10.1002/cctc.201300041


  • Zhang L, AM Karim, MH Engelhard, Z Wei, DL King, and Y Wang. 2012. "Correlation of Pt-Re Surface Properties with Reaction Pathways for the Aqueous-Phase Reforming of Glycerol." Journal of Catalysis 287(1):37-43.  doi:10.1016/j.jcat.2011.11.015
  • Benavidez AD, L Kovarik, A Genc, N Agrawal, EM Larsson, TW Hansen, AM Karim, and AK Datye. 2012. "Environmental Transmission Electron Microscopy Study of the Origins of Anomalous Particle Size Distributions in Supported Metal Catalysts." ACS Catalysis 2(11):2349-2356.  doi:10.1021/cs3005117
  • Karim AM, CJ Howard, BQ Roberts, L Kovarik, L Zhang, DL 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(11):2387-2394.  doi:10.1021/cs3005049
  • Mei D, AM Karim, and Y Wang. 2012. "On the Reaction Mechanism of Acetaldehyde Decomposition on Mo(110)." ACS Catalysis 2(4):468-478.  doi:10.1021/cs3000039
  • Trupy SA, AM Karim, C Bagia, W Deng, Y Huang, DG Vlachos, and J Chen. 2012. "Correlating ethylene glycol reforming activity with in-situ EXAFS detection of Ni segregation in supported NiPt bimetallic catalysts." ACS Catalysis 2(11):2290-2296.  doi:10.1021/cs3004227
  • Wu T, D Childers, C Gomez, AM Karim, N Schweitzer, A Kropf, H Wang, TB Bolin, Y Hu, L Kovarik, R Meyer, and JT Miller. 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(11):2433-2443.  doi:10.1021/cs3004566


  • Lebarbier VMC, AM Karim, MH Engelhard, Y Wu, BQ Xu, EJ Petersen, AK Datye, and Y Wang. 2011. "The Effect of Zn Addition on the Oxidation State of Cobalt in Co/ZrO2 Catalysts." ChemSusChem 4(11):1679-1684.  doi:10.1002/cssc.201100240
  • Dagle RA, AM Karim, G Li, Y Su, and DL King. 2011. "Syngas Conditioning." Chapter 12 in Fuel Cells: Technologies for Fuel Processing, ed. D Shekhawat, JJ Spivey and DA Berry, pp. 361-408.  Elsevier, Amsterdam, Netherlands. 
  • Karim AM, Y Su, MH Engelhard, DL King, and Y Wang. 2011. " Catalytic roles of Co0 and Co2+ during steam reforming of ethanol on Co/MgO catalysts ." ACS Catalysis 1(4):279-286.  doi:10.1021/cs200014j
  • Mei D, AM Karim, and Y Wang. 2011. "Density functional theory study of acetaldehyde hydrodeoxygenation on MoO3." Journal of Physical Chemistry C 115(16):8155-8164.  doi:10.1021/jp200011j


  • Karim AM, Y Su, J Sun, C Yang, JJ Strohm, DL King, and Y Wang. 2010. "A Comparative Study between Co and Rh for Steam Reforming of Ethanol." Applied Catalysis. B, Environmental 96(3-4):441-448.  doi:10.1016/j.apcatb.2010.02.041
  • King DL, L Zhang, G Xia, AM Karim, DJ Heldebrant, X Wang, TH Peterson, and Y Wang. 2010. "Aqueous Phase Reforming of Glycerol for Hydrogen Production Over Pt-Re Supported on Carbon." Applied Catalysis. B, Environmental 99(1-2):206-213 .  doi:10.1016/j.apcatb.2010.06.021


  • Conant T, AM Karim, VMC Lebarbier, Y Wang, F Girgsdies, R Schlogl, and AK Datye. 2008. "Stability of bimetallic Pd-Zn catalysts for the steam reforming of methanol." Journal of Catalysis 257(1):64-70.  doi:10.1016/j.jcat.2008.04.018

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