Inter-regulated d-band centers of the Ni3B/Ni heterostructure for boosting hydrogen electrooxidation in alkaline media

Ni3B/Ni heterostructures have been constructed, which exhibit exceptional catalytic performance toward the hydrogen oxidation reaction (HOR) under alkaline media, with the mass activity being about 10 times greater than that of Ni3B and Ni, respectively, ranking among the most active platinum-group-...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2020-11, Vol.11 (44), p.12118-12123
Main Authors: Yang, Fulin, Han, Pengyu, Yao, Na, Cheng, Gongzhen, Chen, Shengli, Luo, Wei
Format: Article
Language:English
Subjects:
Chemistry
Electrocatalysts
Electron transfer
Heterostructures
Nickel
Oxidation
Platinum
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Summary:Ni3B/Ni heterostructures have been constructed, which exhibit exceptional catalytic performance toward the hydrogen oxidation reaction (HOR) under alkaline media, with the mass activity being about 10 times greater than that of Ni3B and Ni, respectively, ranking among the most active platinum-group-metal-free electrocatalysts. Experimental results and theoretical calculations confirm electron transfer from Ni3B to Ni at the Ni3B/Ni interface, resulting in inter-regulated d-band centers of these two components. This inter-regulation gives rise to optimized binding energies of intermediates, which together contribute to enhanced alkaline HOR activity.
ISSN:2041-6520
2041-6539
DOI:10.1039/d0sc03917a