含S缺陷MoS<sub>2</sub>的合成及其电化学析氢反应性能研究

孙淑敏; 闫堉琦; 侯一航; 周超; 王培远

doi:10.12187/2021.02.008

April 2021

Article Contents

SUN Shumin, YAN Yuqi, HOU Yihang, et al. Study on synthesis of sulfur-vacancy MoS2 and its electrochemical hydrogen evolution reaction performance[J]. Journal of Light Industry, 2021, 36(2): 55-63. doi: 10.12187/2021.02.008

Citation: SUN Shumin, YAN Yuqi, HOU Yihang, et al. Study on synthesis of sulfur-vacancy MoS2 and its electrochemical hydrogen evolution reaction performance[J]. Journal of Light Industry, 2021, 36(2): 55-63. doi: 10.12187/2021.02.008 shu

Study on synthesis of sulfur-vacancy MoS₂ and its electrochemical hydrogen evolution reaction performance

College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China

Received Date: 2020-05-12

Abstract

Using ammonium tetrathiomolybdate and hydrazine hydrate as raw materials,the sulfur-vacancy containing MoS₂ was synthesized by simple hydrothermal synthesis combined with subsequent ethanol solvothermal treatment,and its hydrogen evolution reaction (HER) performance was investigated.The electrochemical performance was calculated by first principle density functional theory.The results showed that sulfur-vacancy had obvious effect on HER performance of MoS₂.The Tafel slope of the sample Eth24h-MoS₂ obtained by ethanol solvothermal treatment for 24 h was 69 mV/dec and the overpotential was 237 mV at current density of 10 mA/cm²,which was significantly lower than that of the original MoS₂,and had good electrochemical stability.With the increase of sulfur-vacancy density,the band gap of MoS₂ decreased and its conductivity improved.The hydrogen adsorption free energy ΔG_H of sulfur-vacancy position and sulfur-vacancy free position decreased rapidly.The closer the hydrogen adsorption site was to the sulfur-vacancy position,the smaller the ΔG_H value was.
- MoS₂,
- sulfur-vacancy,
- electrochemical hydrogen evolution reaction,
- ethanol solvothermal treatment method
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