Sun Lei, Geng Jiahui, Gao Mengyou, Zheng Dehua, Jing Zhongxin, Zhao Qingyun, Lin Jianjian
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Chemistry. 2021 Jul 26;27(42):10998-11004. doi: 10.1002/chem.202101182. Epub 2021 Jun 9.
Fe S with high reactivity and stability was incorporated into WS nanosheets via a one-step solvothermal method for the first time. The resulted hybrid catalyst has much higher catalytic activity than WS and Fe S alone, and the optimal WS /Fe S hybrid catalyst was found by adjusting the feed ratio. The addition of Fe S was proven to be able to enhance the hydrogen evolution reaction (HER) activity of WS , 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 /Fe S -2 hybrid catalyst leads to enhanced HER activity, which shows a low overpotential of ∼0.172 V at 10 mA cm , low Tafel slope of ∼53.47 mV/decade. This study supplies innovative synthesis of a highly active WS /Fe S hybrid catalyst for HER.
首次通过一步溶剂热法将具有高反应活性和稳定性的FeS掺入WS纳米片中。所得的杂化催化剂具有比单独的WS和FeS高得多的催化活性，并且通过调节进料比找到了最佳的WS/FeS杂化催化剂。事实证明，添加FeS能够增强WS的析氢反应（HER）活性，反之亦然。同时，发现当进料比为W∶Fe = 2∶1时，杂化催化剂的催化效果最佳。换句话说，我们证实了W基和Fe基硫化物杂化催化剂之间存在协同效应，并验证了HER性能提高的原因是两者在中间硫处的强相互作用。WS/FeS-2杂化催化剂导致HER活性增强，在10 mA cm时显示出约0.172 V的低过电位，约53.47 mV/decade的低塔菲尔斜率。本研究为HER提供了一种高活性WS/FeS杂化催化剂的创新合成方法。
