期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 27, 页码 13662-13668出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm31916k
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资金
- National Basic Research Program of China [2010CB934700]
- National Natural Science Foundation of China [91022032, 21061160492, J1030412]
- Chinese Academy of Sciences [KJZD-EW-M01-1]
- International Science & Technology Cooperation Program of China [2010DFA41170]
- National Synchrotron Radiation Laboratory (NSRL) at the University of Science and Technology of China
Nickel (Ni)-based nanomaterials have been intensively explored as promising noble-metal-free hydrogen evolution reaction (HER) electrocatalysts. Here, we report that uniform sea urchin-like NiSe nanofiber assemblies can be prepared on a large scale by a ternary mixed solvent strategy. The new NiSe exhibits very high HER activity in 0.5 M H2SO4, comparable to the best performance of the well-studied MoS2 catalysts. The Tafel slope of similar to 64 mV per decade was observed for the sea urchin-like NiSe catalyst, suggesting that the Volmer-Heyrovsky HER mechanism presumably takes effect in the HER. Although the stability of such a NiSe nanofiber assembled nanostructure needs to be further improved, this study addresses the benefits and possibilities of using Ni-based chalcogenides to design high performance and low cost HER catalysts.
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