WS2/NiSx heterojunction nanosheet clusters: A highly efficient electrocatalyst for hydrogen evolution reaction |
| |
Affiliation: | 1. Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, School of Medical and Information Engineering, Scientific Research Center, Gannan Medical University, Ganzhou 341000, China;2. College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China |
| |
Abstract: | The development of highly active and stable electrocatalysts is essential to solve energy and environmental problems and realize sustainable social and economic development. Herein, we synthesized a bimetallic sulfide material by a kinetically controlled low-temperature solid-phase reaction. The bimetallic sulfide improves the conductivity of the electrocatalysts by optimized electronic structure, and the coupling effect at the heterogeneous interface of WS2 and NiSx increases the charge density on the S site at W–S–Ni, making it easier for the electrocatalysts to trap the active material in solution. In addition, nanosheet clusters expose abundant catalytic sites, which together improve hydrogen evolution reaction (HER) for catalytic activity. Optimized WS2/NiSx composite show near-precious metal catalyst activity with an overpotential at 10 mA cm?2 of only 72 mV in alkaline media, which exhibits excellent catalytic stability and outperforms most non-precious metal electrocatalysts. |
| |
Keywords: | Bimetallic sulfide material Solid-phase reaction Hydrogen evolution reaction |
本文献已被 ScienceDirect 等数据库收录! |
|