• 文献标题:   In Situ Growth of NiSe2-MoSe2 Heterostructures on Graphene Nanosheets as High-Performance Electrocatalyst for Hydrogen Evolution Reaction
  • 文献类型:   Article
  • 作  者:   DAI TJ, ZHOU ZY, XIAO H, LUO YC, XU YC, WANG XQ
  • 作者关键词:   nise2, mose2 heterostructure, synergistic effect, electrocatalyst, her
  • 出版物名称:   CATALYSTS
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   3
  • DOI:   10.3390/catal12070701
  • 出版年:   2022

▎ 摘  要

Developing highly efficient and stable electrocatalysts for hydrogen evolution reaction (HER) is regarded as a crucial way to reduce energy loss in water splitting. Herein, NiSe2/MoSe2 heterostructures grown on graphene nanosheets (NiSe2-MoSe2 HTs/G) have been in situ synthesized by a simple hydrothermal reaction. As an electrocatalyst for HER, NiSe2-MoSe2 HTs/G delivers superior performance with a low Tafel slope of 65 mV dec(-1), a small overpotential of 144 mV at 10 mA cm(-2), and long-term stability up to 24 h. The superior performance for HER can be mainly ascribed to the synergistic effects of NiSe2-MoSe2 heterostructures, which can facilitate the rapid electron transfer from the electrode to the exposed MoSe2 edges to take part in the HER reaction, thus boosting the HER kinetics. Moreover, the graphene matrix with high conductivity can not only improve the overall conductivity of the composite but also greatly increase the exposed active sites, therefore further promoting the HER performance. This study provides a simple route for fabricating bimetallic selenides-based heterostructures on graphene as an efficient and stable electrocatalyst for HER.