中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 9 September 2023 |
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China）
Abstract:To solve the poor conductivity and limited active sites of MoSe2, ternary MoSxSe2-x nanosheets with defects were synthesized by a convenient hydrothermal process. The results showed that the introduction of S element not only improved the electron transfer ability, but also provided more electrocatalytic active sites. Consequently, the optimized MoSxSe2-x with a S/Se molar ratio of 1:1 (MoSSe) presented superior electrocatalytic hydrogen evolution reaction performance with a low Tafel slope of 47 mV/dec, and a small overpotential of -165 mV at -10 mA/cm2 as well as good durability. This work provides an additional route for better understanding the modulation of multi-factors in designing and synthesizing MoSe2-based catalysts to improve their electrochemical activity.
Key words: ternary MoSxSe2-x alloy; defect; synergistic effect; electrocatalyst; hydrogen evolution
