期刊
ELECTROCHIMICA ACTA
卷 320, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.134614
关键词
MoS2/NiS-Ni3S2; Flower-like microspheres; Synergistic effect; Hydrogen evolution reaction; Oxygen evolution reaction
资金
- National Natural Science Foundation of China [51401140]
- Natural Science Foundation of Shanxi Province, China [201801D121100]
- Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi Province (OIT)
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (STIP) [201802033]
- Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology [2016e06]
The MoS2/NiS-Ni3S2 core-shell structure with flower-like microspheres morphology is a product of reasonable construction on nickel foam. The synergistic effect of heterostructure and abundant active sites make the catalyst exhibits excellent performance in alkaline solution, especially at high current. Specifically, at 200 mA cm(-2) current density, the MoS2/NiS-Ni3S2 composite exhibits small overpotential of 181 mV and Tafel slope of 70.0 mV dec(-1) for hydrogen evolution reaction, and low overpotential of 460 mV and Tafel slope of 30.3 mV dec(-1) for oxygen evolution reaction. Moreover, MoS2/NiS-Ni3S2 can run stably for 12 h at 200 mA cm(-2) current density without obvious fluctuation, showing excellent durability. Meanwhile, MoS2/NiS-Ni3S2 as an electrolyzer achieves a current density of 10 mA cm(-2) at 1.49 V, without decay after a durability test of 12 h. These superior properties of the MoS2/NiS-Ni3S2 make it become a powerful competitor for the high activity bifunctional non-noble-metal electrocatalysts. (C) 2019 Elsevier Ltd. All rights reserved.
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