期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 14, 页码 16157-16164出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c24363
关键词
hydrogen evolution reaction; sulfur incorporation; tungsten diphosphide; nanosheet arrays; tuning electronic structure
资金
- National Natural Science Foundation of China [22062005, 22165005, U20A20128, 52004076]
- Guangxi Science Fund for Distinguished Young Scholars [2019GXNSFFA245016]
In this study, a self-supporting nanosheet array material with sulfur incorporation into WP2 was successfully constructed. The optimized catalyst exhibited excellent stability and activity in acidic media, and sulfur substitution effectively improved the intrinsic activity of the catalyst. This work provides valuable guidance for the preparation of highly efficient flexible electrode materials based on electrocatalysts.
Exploring the highly active and stable nonprecious metal electrocatalysts is particularly important for the advancement of water electrolysis, whereas it remains a challenge to efficiently improve the intrinsic electrocatalytic activity. Herein, we reasonably constructed a self-supporting nanosheet array material with sulfur incorporated into WP2. Because of the tunability of electronic configuration and the formation of partial metal phase sulfides, the optimized catalyst exhibits a low overpotential of 115 mV at 10 mA cm(-2), along with superb durability over 24 h in acidic media. Furthermore, theoretical calculations reveal that sulfur substitution effectively manipulates the local electronic configuration of WP2, which reduces the interaction between the catalyst surface and hydrogen atoms, thus improving the intrinsic activity of the hydrogen evolution reaction. This work provides valuable insight into the rational fabrication of highly efficient flexible electrode materials based on resourceful electrocatalysts for electrochemical water splitting.
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