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Carbon doping switching on the hydrogen adsorption activity of NiO for hydrogen evolution reaction

Open access
Kou, Tianyi, Chen, Mingpeng, Wu, Feng, Smart, Tyler J., Wang, Shanwen, Wu, Yishang, Zhang, Ying, Li, Shengtong, Lall, Supriya, Zhang, Zhonghua, Liu, Yi-Sheng, Guo, Jinghua, Wang, Gongming, Ping, Yuan, Li, Yat·2020·Nature Communications

Abstract

Hydrogen evolution reaction (HER) is more sluggish in alkaline than in acidic media because of the additional energy required for water dissociation. Numerous catalysts, including NiO, that offer active sites for water dissociation have been extensively investigated. Yet, the overall HER performance of NiO is still limited by lacking favorable H adsorption sites. Here we show a strategy to activate NiO through carbon doping, which creates under-coordinated Ni sites favorable for H adsorption. DFT calculations reveal that carbon dopant decreases the energy barrier of Heyrovsky step from 1.17 eV to 0.81 eV, suggesting the carbon also serves as a hot-spot for the dissociation of water molecules in water-alkali HER. As a result, the carbon doped NiO catalyst achieves an ultralow overpotential of 27 mV at 10 mA cm−2, and a low Tafel slope of 36 mV dec−1, representing the best performance among the state-of-the-art NiO catalysts.

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Metadata

Authors
Kou, T., Chen, M., Wu, F., Smart, T. J., Wang, S., Wu, Y., Zhang, Y., Li, S., Lall, S., Zhang, Z., Liu, Y.-S., Guo, J., Wang, G., Ping, Y., & Li, Y.
Venue
Nature Communications
Published
2020-01-30
Volume
11
Issue
1
Pages
590-590
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3004165665
Cited by
280
References
3
FWCI
7.90
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Carbon doping switching on the hydrogen adsorption activity of NiO for hydrogen evolution reaction. https://app.cochat.ai/papers/10.1038/s41467-020-14462-2
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Kou, T., Chen, M., Wu, F., Smart, T. J., Wang, S., Wu, Y., Zhang, Y., Li, S., Lall, S., Zhang, Z., Liu, Y.-S., Guo, J., Wang, G., Ping, Y., & Li, Y. (2020). Carbon doping switching on the hydrogen adsorption activity of NiO for hydrogen evolution reaction. Nature Communications. https://doi.org/10.1038/s41467-020-14462-2

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