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The Dissociation and Reduction of Molecular Oxygen on Platinum, Palladium, Iridium, Rhodium, and Gold

29 October 2024, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Herein, a method is presented to determine the kinetics of the oxygen dissociation on different metals, allowing for the determination of the oxygen reduction reaction mechanism. This analysis reveals that molecular oxygen rapidly dissociates to underpotentially deposited oxygen species on platinum and rhodium surfaces. These species' experimentally determined surface charges lead to a simple kinetic model of the ORR, which agrees well with experimental ORR activities and predicts the Volcano relationship with the oxygen reduction reaction.

Keywords

ORR
O-upd
Oxygen dissociation

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Version History

Oct 29, 2024 Version 1

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The content is available under CC BY 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2024-0tjc0
D O I: 10.26434/chemrxiv-2024-0tjc0 [opens in a new tab]

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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