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Lamella-heterostructured nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride electrodes as stable catalysts for oxygen evolution

Open access
Zeng, Shu-Pei, Shi, Hang, Dai, Tian-Yi, Liu, Yang, Wen, Zi, Han, Gao-Feng, Wang, Tong-Hui, Zhang, Wei, Lang, Xing-You, Zheng, Wei-Tao, Jiang, Qing·2023·Nature Communications

Abstract

Developing robust nonprecious-metal electrocatalysts with high activity towards sluggish oxygen-evolution reaction is paramount for large-scale hydrogen production via electrochemical water splitting. Here we report that self-supported laminate composite electrodes composed of alternating nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride (FeCo/CeO 2−xNx) heterolamellas hold great promise as highly efficient electrocatalysts for alkaline oxygen-evolution reaction. By virtue of three-dimensional nanoporous architecture to offer abundant and accessible electroactive CoFeOOH/CeO 2−xNx heterostructure interfaces through facilitating electron transfer and mass transport, nanoporous FeCo/CeO 2−xNx composite electrodes exhibit superior oxygen-evolution electrocatalysis in 1 M KOH, with ultralow Tafel slope of ~33 mV dec−1. At overpotential of as low as 360 mV, they reach >3900 mA cm−2 and retain exceptional stability at ~1900 mA cm−2 for >1000 h, outperforming commercial RuO 2 and some representative oxygen-evolution-reaction catalysts recently reported. These electrochemical properties make them attractive candidates as oxygen-evolution-reaction electrocatalysts in electrolysis of water for large-scale hydrogen generation.

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Crossref · 10.1038/s41467-023-37597-4

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Metadata

Authors
Zeng, S.-P., Shi, H., Dai, T.-Y., Liu, Y., Wen, Z., Han, G.-F., Wang, T.-H., Zhang, W., Lang, X.-Y., Zheng, W.-T., & Jiang, Q.
Venue
Nature Communications
Published
2023-03-31
Volume
14
Issue
1
Pages
1811-1811
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4362469439
Cited by
189
References
8
FWCI
8.85
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Lamella-heterostructured nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride electrodes as stable catalysts for oxygen evolution. https://app.cochat.ai/papers/10.1038/s41467-023-37597-4
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Zeng, S.-P., Shi, H., Dai, T.-Y., Liu, Y., Wen, Z., Han, G.-F., Wang, T.-H., Zhang, W., Lang, X.-Y., Zheng, W.-T., & Jiang, Q. (2023). Lamella-heterostructured nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride electrodes as stable catalysts for oxygen evolution. Nature Communications. https://doi.org/10.1038/s41467-023-37597-4

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