期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 9, 页码 11884-11891出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b02164
关键词
Transition-metal dichalcogenide; Electrocatalyst; Nanowires; Hydrogen evolution reaction
资金
- National Natural Science Foundation of China [51401034]
- Key Research and Development Plan in Shaanxi Province of China [2017GY-033]
- Shaanxi Postdoctoral Science Foundation [2017BSHTDZZ01]
- China Scholarship Council (CSC) [201706565012]
- Special Fund for Basic Scientific Research of Central Colleges, Chang'an University [310831172001]
- Australian Research Council [DP160103107, FT170100224]
NiSe2 nanowire (NW) arrays grown on flexible carbon fiber paper (CFP) were synthesized, for the first time, through a novel thermal selenization method in vacuum instead of flowing inert gas. The ultrathin NiSe2 NWs uniformly cover the CFP, contributing to the large surface area and fast charge transportation. Desirably, this binder-free and hierarchical electrode shows favorable activity for hydrogen evolution reaction (HER). It only requires an overpotential of 172 mV to afford the current density of 100 mA cm(-2) in 0.5 M H2SO4, corresponding to a low Tafel slope of 32.44 mV dec(-1). After 1000 continuous cycles, the HER activity of NiSe2 NWs is well-maintained. Moreover, the current density remains unchanged in prolonged electrolysis, indicating an excellent durability of NiSe2 NWs. The novel preparation method described in this study could inspire future work on the synthesis of transition-metal dichalcogenides with high purity and ultrasmall nanostructure toward improved electrocatalytic activity.
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