高效CoMo双金属硫化物电极构筑及电催化析氢性能研究
Research on Building of Highly Efficient CoMo Bimetallic Sulfide Electrode and Electrocatalytic Hydrogen Evolution
杨杰 1马自在 2孙家祺 1王孝广3
作者信息
- 1. 太原理工大学材料科学与工程学院, 山西 太原 030024
- 2. 气体能源清洁高效利用山西省重点实验室, 山西 太原 030024
- 3. 太原理工大学材料科学与工程学院, 山西 太原 030024;气体能源清洁高效利用山西省重点实验室, 山西 太原 030024
- 折叠
摘要
结合电弧熔炼技术和脱合金化法制备了钴钼多孔合金,利用化学气相沉积进行蒸汽硫化,构筑了自支撑CoMo双金属硫化物电极.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)分析了物相组成和微观形貌,利用线性扫描伏安法、计时电位法等测试了电极的析氢性能和稳定性.结果表明:适量钼元素的加入促进了CoMo硫化物纳米线的密集生长,增大了比表面积,便于析氢反应过程中的电子传输.催化剂在酸性介质中表现出优异的析氢性能,Co13Mo2-S电极在阴极析氢过程中在 10、100 mA·cm-2 的电流密度下过电位分别为 94、172 mV,塔菲尔斜率仅为 59 mV·dec-1,同时表现出良好的析氢稳定性和耐久性.
Abstract
CoMo porous alloy was firstly prepared by arc melting technology and dealloying method.After chemical vapor deposition of sulfur,the self-supported CoMo bimetallic sulfide electrode was obtained.The phase composition and microstructure were analyzed by XRD and SEM.The hydrogen evolution performance and stability of the electrode were tested by linear sweep voltammetry,chronopotentiometry,etc.The results show that the introduction of an appropriate amount of Mo element promotes the dense growth of CoMo sulfide nanowires,thereby increases the specific surface area and facilitates electron transport during the hydrogen evolution reaction.The catalyst exhibits excellent hydrogen evolution performance in acidic media.The Co13Mo2-S electrode reaches current density of 10 mA·cm-2 and 100 mA·cm-2 at low overpotential of 94 mV and 172 mV,and the Tafel slope is only 59 mV·dec-1.Besides,Co13Mo2-S electrode manifests good hydrogen evolution stability and durability.
关键词
电弧熔炼/脱合金/蒸汽硫化/纳米线/析氢反应Key words
arc melting/dealloying/sulfurization/nanowires/hydrogen evolution reaction(HER)引用本文复制引用
基金项目
国家自然科学基金(21878201)
国家自然科学基金(22008165)
山西省青年拔尖人才支持计划(第七批)()
出版年
2024
NETL
NSTL
万方数据