期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 50, 页码 22743-22748出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202011378
关键词
CoSe; coupled vacancy pairs; doping; hydrogen evolution reaction
资金
- National Key R&D Program of China [2019YFA0308500]
- Key Research and Development of Ministry of Science and Technology of China [2018YFE0202601]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB07030200]
- National Natural Science Foundation of China [51922081, 51421002, 51672307, 51991344]
- Natural Science Foundation of Zhejiang Province [LTY20E020001]
Vacancy engineering plays vital role in the design of high-performance electrocatalysts. Here, we introduced coupled cation-vacancy pairs in Ni-doped CoSe to achieve boosted hydrogen evolution reaction (HER) activity through a facile topochemical intercalation approach. Adjacent Co vacancy pairs and heteroatom Ni doping contribute together for the upshift of the Se 4p(z)orbital, which induces larger overlap between the Se 4p and H 1s orbitals. As a result, the free energy of H adsorption can be lowered significantly. With an advanced HER activity of 185.7 mV at 10 mA cm(-2), this work provides new direction and guidance for the design of novel electrocatalysts.
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