Cation–hydroxide–water coadsorption inhibits the alkaline hydrogen oxidation reaction

Chung, Hoon Taek; Martinez, Ulises; Matanovic, Ivana; Kim, Yu Seung

doi:10.1021/acs.jpclett.6b02025

Title: Cation–hydroxide–water coadsorption inhibits the alkaline hydrogen oxidation reaction

Journal Article · Mon Oct 24 00:00:00 EDT 2016 · Journal of Physical Chemistry Letters

DOI:https://doi.org/10.1021/acs.jpclett.6b02025· OSTI ID:1356127

^[1];

^[1]; Matanovic, Ivana ^[2]; Kim, Yu Seung ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The Univ. of New Mexico, Albuquerque, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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. Finally, these results give useful insights on how to design ionomeric binders for advanced alkaline membrane fuel cells.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1356127

Report Number(s):: LA-UR-15-27065

Journal Information:: Journal of Physical Chemistry Letters, Vol. 7, Issue 22; ISSN 1948-7185

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 43 works

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Cited By (2)

How cations affect the electric double layer and the rates and selectivity of electrocatalytic processes Waegele, Matthias M.; Gunathunge, Charuni M.; Li, Jingyi The Journal of Chemical Physics, Vol. 151, Issue 16 https://doi.org/10.1063/1.5124878	journal	October 2019
Quaternary Ammonium Cation Specific Adsorption on Platinum Electrodes: A Combined Experimental and Density Functional Theory Study McCrum, I. T.; Hickner, M. A.; Janik, M. J. Journal of The Electrochemical Society, Vol. 165, Issue 2 https://doi.org/10.1149/2.1351802jes	journal	January 2018

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