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Modifying redox properties and local bonding of Co3O4 by CeO2 enhances oxygen evolution catalysis in acid

Open access
Huang, Jinzhen, Sheng, Hongyuan, Ross, R. Dominic, Han, Jiecai, Wang, Xianjie, Song, Bo, Jin, Song·2021·Nature Communications

Abstract

Developing efficient and stable earth-abundant electrocatalysts for acidic oxygen evolution reaction is the bottleneck for water splitting using proton exchange membrane electrolyzers. Here, we show that nanocrystalline CeO 2 in a Co 3 O 4/CeO 2 nanocomposite can modify the redox properties of Co 3 O 4 and enhances its intrinsic oxygen evolution reaction activity, and combine electrochemical and structural characterizations including kinetic isotope effect, pH- and temperature-dependence, in situ Raman and ex situ X-ray absorption spectroscopy analyses to understand the origin. The local bonding environment of Co 3 O 4 can be modified after the introduction of nanocrystalline CeO 2, which allows the Co III species to be easily oxidized into catalytically active Co IV species, bypassing the potential-determining surface reconstruction process. Co 3 O 4/CeO 2 displays a comparable stability to Co 3 O 4 thus breaks the activity/stability tradeoff. This work not only establishes an efficient earth-abundant catalysts for acidic oxygen evolution reaction, but also provides strategies for designing more active catalysts for other reactions.

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Metadata

Authors
Huang, J., Sheng, H., Ross, R. D., Han, J., Wang, X., Song, B., & Jin, S.
Venue
Nature Communications
Published
2021-05-24
Volume
12
Issue
1
Pages
3036-3036
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3165057005
Cited by
707
References
8
FWCI
19.10
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Modifying redox properties and local bonding of Co3O4 by CeO2 enhances oxygen evolution catalysis in acid. https://app.cochat.ai/papers/10.1038/s41467-021-23390-8
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Huang, J., Sheng, H., Ross, R. D., Han, J., Wang, X., Song, B., & Jin, S. (2021). Modifying redox properties and local bonding of Co3O4 by CeO2 enhances oxygen evolution catalysis in acid. Nature Communications. https://doi.org/10.1038/s41467-021-23390-8

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