Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 7, Issue 22, Pages 4464-4469Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.6b02025
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Funding
- U.S. Department of Energy, Energy Efficiency and Renewable Energy, Fuel Cell Technology Office Incubator Program [DE-EE0006962]
- Los Alamos National Security LLC [DE-AC52-06NA25396]
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Rotating disk electrode voltammograms and infrared reflection absorption spectra indicate that the hydrogen oxidation reaction of platinum in 0.1 M tetramethylammonium hydroxide solution is adversely impacted by time-dependent and potential-driven cation-hydroxide-water coadsorption. Impedance analysis suggests that the hydrogen oxidation reaction inhibition is mainly caused by the hydrogen diffusion barrier of the coadsorbed trilayer rather than intuitive catalyst site blocking by the adsorbed cation species. These results give useful insights on how to design ionomeric binders for advanced alkaline membrane fuel cells.
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