Keegan M. Caldwell, Ph.D.

Affiliations: 
2014 Chemistry The George Washington University, Washington, DC, United States 
Area:
Physical Chemistry, Energy, Alternative Energy
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Parents

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David E. Ramaker grad student 2014 The George Washington University
 (In Situ XAS Studies of PEM and HT-PEM Fuel Cell Electrocatalysts.)
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Publications

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Jia Q, Li J, Caldwell K, et al. (2016) Circumventing Metal Dissolution Induced Degradation of Pt-Alloy Catalysts in Proton Exchange Membrane Fuel Cells: Revealing the Asymmetric Volcano Nature of Redox Catalysis Acs Catalysis. 6: 928-938
Jia Q, Caldwell K, Strickland K, et al. (2015) Improved Oxygen Reduction Activity and Durability of Dealloyed PtCo x Catalysts for Proton Exchange Membrane Fuel Cells: Strain, Ligand, and Particle Size Effects. Acs Catalysis. 5: 176-186
Caldwell KM, Ramaker DE, Jia Q, et al. (2015) Spectroscopic in situ Measurements of the Relative Pt Skin Thicknesses and Porosities of Dealloyed PtM n (Ni, Co) Electrocatalysts. The Journal of Physical Chemistry. C, Nanomaterials and Interfaces. 119: 757-765
Roth C, Kaserer S, Brieger C, et al. (2015) The power of in-situ studies: How X-ray absorption spectroscopy can help to develop PEMFC catalysts with increased activity and stability Ecs Transactions. 69: 147-156
Caldwell KM, Kaserer S, Roth C, et al. (2015) Following Adsorbate Coverage on Anodes of High-Temperature Polymer Electrolyte Membrane Fuel Cells in the Presence of CO and H2O by using InOperando X-ray Absorption Spectroscopy Chemelectrochem. 2: 1502-1509
Jia Q, Caldwell K, Ziegelbauer JM, et al. (2014) The Role of OOH Binding Site and Pt Surface Structure on ORR Activities. Journal of the Electrochemical Society. 161: F1323-F1329
Jia Q, Caldwell K, Ramaker DE, et al. (2014) In situ spectroscopic evidence for ordered core-ultrathin shell Pt1Co1 nanoparticles with enhanced activity and stability as oxygen reduction electrocatalysts Journal of Physical Chemistry C. 118: 20496-20503
Kaserer S, Caldwell KM, Ramaker DE, et al. (2013) Analyzing the influence of H3PO4 as catalyst poison in high temperature PEM fuel cells using in-operando X-ray absorption spectroscopy Journal of Physical Chemistry C. 117: 6210-6217
Jia Q, Segre CU, Ramaker D, et al. (2013) Structure-property-activity correlations of Pt-bimetallic nanoparticles: A theoretical study Electrochimica Acta. 88: 604-613
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