Issue 23, 2017

Elucidating the alkaline oxygen evolution reaction mechanism on platinum

Abstract

Understanding the interplay between surface chemistry, electronic structure, and reaction mechanism of the catalyst at the electrified solid/liquid interface will enable the design of more efficient materials systems for sustainable energy production. The substantial progress in operando characterization, particularly using synchrotron based X-ray spectroscopies, provides the unprecedented opportunity to uncover surface chemical and structural transformations under various (electro)chemical reaction environments. In this work, we study a polycrystalline platinum surface under oxygen evolution conditions in an alkaline electrolyte by means of ambient pressure X-ray photoelectron spectroscopy performed at the electrified solid/liquid interface. We elucidate previously inaccessible aspects of the surface chemistry and structure as a function of the applied potential, allowing us to propose a reaction mechanism for oxygen evolution on a platinum electrode in alkaline solutions.

Graphical abstract: Elucidating the alkaline oxygen evolution reaction mechanism on platinum

Supplementary files

Article information

Article type
Paper
Submitted
12 jan. 2017
Accepted
08 feb. 2017
First published
07 mar. 2017
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2017,5, 11634-11643

Elucidating the alkaline oxygen evolution reaction mechanism on platinum

M. Favaro, C. Valero-Vidal, J. Eichhorn, F. M. Toma, P. N. Ross, J. Yano, Z. Liu and E. J. Crumlin, J. Mater. Chem. A, 2017, 5, 11634 DOI: 10.1039/C7TA00409E

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