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Novel WS 2 /Fe 0.95 S 1.05 Hierarchical Nanosphere as a Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction
Author(s) -
Sun Lei,
Geng Jiahui,
Gao Mengyou,
Zheng Dehua,
Jing Zhongxin,
Zhao Qingyun,
Lin Jianjian
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202101182
Subject(s) - overpotential , catalysis , tafel equation , electrocatalyst , reactivity (psychology) , sulfide , materials science , chemistry , chemical engineering , nanotechnology , metallurgy , electrochemistry , organic chemistry , electrode , engineering , medicine , alternative medicine , pathology
Fe 0.95 S 1.05 with high reactivity and stability was incorporated into WS 2 nanosheets via a one‐step solvothermal method for the first time. The resulted hybrid catalyst has much higher catalytic activity than WS 2 and Fe 0.95 S 1.05 alone, and the optimal WS 2 /Fe 0.95 S 1.05 hybrid catalyst was found by adjusting the feed ratio. The addition of Fe 0.95 S 1.05 was proven to be able to enhance the hydrogen evolution reaction (HER) activity of WS 2 , and vice versa. At the same time, it was found that the catalytic effect of the hybrid catalyst was the best when the feed ratio was W : Fe=2 : 1. In other words, we confirmed that there is a synergistic effect between W‐ and Fe‐based sulfide hybrid catalysts, and validated that the reason for the improved HER performance is the strong interaction between the two in the middle sulfur. WS 2 /Fe 0.95 S 1.05 ‐2 hybrid catalyst leads to enhanced HER activity, which shows a low overpotential of ∼0.172 V at 10 mA cm −2 , low Tafel slope of ∼53.47 mV/decade. This study supplies innovative synthesis of a highly active WS 2 /Fe 0.95 S 1.05 hybrid catalyst for HER.