A CoVO precatalyst for the oxygen evolution reaction: highlighting the importance of postmortem electrocatalyst characterization
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 CoV 2 O 4 material that...
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Published in | Chemical communications (Cambridge, England) Vol. 57; no. 7; pp. 883 - 886 |
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Main Authors | , , , , |
Format | Journal Article |
Published |
28.01.2021
|
Online Access | Get full text |
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Summary: | 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 CoV
2
O
4
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 CoO
x
material, suggesting that this vanadium-free material, and not CoV
2
O
4
, is the active catalyst. This study highlights the importance of postmortem characterization prior to mechanistic and computational analysis for this class of materials.
Postmortem analysis of a CoV
2
O
4
catalyst for oxygen evolution reveals the active species is likely a vanadium-free amorphous cobalt oxide. |
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Bibliography: | probe, and comparative table of the OER activities of other nanoparticulate catalysts based on as-synthesized activity metrics. See DOI 2 production using an 3 Electronic supplementary information (ESI) available: Experimental methods and details, additional characterization data for the as-synthesized and post-OER materials, cyclic voltammograms of V in alkaline conditions, measured O in situ O 10.1039/d0cc06513g |
ISSN: | 1359-7345 1364-548X |
DOI: | 10.1039/d0cc06513g |