Study on electrocatalytic performance of sulfur-doped tungsten oxide for hydrogen evolution reaction
贾鹏飞 1杨军 1李硕 1郑璐瑶 1张煜国1
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作者信息
1. 陕西科技大学材料科学与工程学院,陕西西安 710021
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摘要
通过硫掺杂来改善氧化钨(WO3)电催化剂活性不足和反应动力学缓慢的问题.采用二次煅烧法成功合成了硫掺杂氧化钨(S-WO3)电催化剂,并系统地研究了掺杂浓度对其形貌、结构和电化学性能的影响.结果表明,硫掺入氧化钨后能够在引入氧缺陷的同时调控电子结构,显著提高了氧化钨的电催化活性.使用硫粉量为0.11 g的S-WO3-1催化剂具有最佳的硫掺杂浓度.为了实现10 mA cm-2的电流密度仅仅需要161 mV过电位,并且能够持续长达30 000 s的析氢过程,显示出优异的催化活性和循环稳定性.本研究为开发掺杂型高效析氢电催化剂提供了新途径.
Abstract
Tungsten oxide(WO3)electrocatalyst was improved the problem of insufficient ac-tivity and slow reaction kinetics by sulfur doping.Sulfur-doped tungsten oxide(S-WO3)elec-trocatalysts with different doping concentrations were successfully synthesized by the sec-ondary calcination method.The effects of doping concentration on its morphology,structure and electrochemical properties have been systematically studied.The results show that sulfur doping into tungsten oxide can modulate the electronic structure while introducing oxygen defects.It significantly improves the electrocatalytic activity of tungsten oxide.The S-WO3-1 catalyst using a sulfur powder amount of 0.11 g had the best sulfur doping concentration.The catalyst requires only 161 mV overpotential to achieve a current density of 10 mA cm and can sustain hydrogen evolution for up to 30 000 s which shows excellent catalytic activity and cyclic stability.This study provides a new way to develop efficient hydrogen evolution electrocatalysts.
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