Cation–Hydroxide–Water Coadsorption Inhibits the Alkaline Hydrogen Oxidation Reaction | Zendy

Hoon T Chung | Zendy; Ulises Martinez | Zendy; Ivana Matanović | Zendy; Yu Seung Kim | Zendy

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Cation–Hydroxide–Water Coadsorption Inhibits the Alkaline Hydrogen Oxidation Reaction

Author(s) -

Hoon T Chung,

Ulises Martinez,

Ivana Matanović,

Yu Seung Kim

Publication year - 2016

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.6b02025

Subject(s) - hydroxide , chemistry , inorganic chemistry , hydrogen , organic chemistry

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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