Issue 7, 2021

A CoV2O4 precatalyst for the oxygen evolution reaction: highlighting the importance of postmortem electrocatalyst characterization

Abstract

Vanadium-doped cobalt oxide materials have emerged as a promising class of catalysts for the oxygen evolution reaction. Previous studies suggest vanadium doping in crystalline Co spinel materials tunes the electronic structure and stabilizes surface intermediates. We report a CoV2O4 material that shows good activity for the oxygen evolution reaction. However, postmortem characterization of the catalyst material shows dissolution of vanadium resulting in an amorphous CoOx material, suggesting that this vanadium-free material, and not CoV2O4, is the active catalyst. This study highlights the importance of postmortem characterization prior to mechanistic and computational analysis for this class of materials.

Graphical abstract: A CoV2O4 precatalyst for the oxygen evolution reaction: highlighting the importance of postmortem electrocatalyst characterization

Supplementary files

Article information

Article type
Communication
Submitted
28 9 2020
Accepted
04 12 2020
First published
07 12 2020

Chem. Commun., 2021,57, 883-886

Author version available

A CoV2O4 precatalyst for the oxygen evolution reaction: highlighting the importance of postmortem electrocatalyst characterization

S. E. Michaud, M. T. Riehs, W. Feng, C. Lin and C. C. L. McCrory, Chem. Commun., 2021, 57, 883 DOI: 10.1039/D0CC06513G

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