摘要
Abstract
Graphene-supported S-doped NiFe LDH electrocatalyst(NFG@NiFe-S LDH)was prepared by CVD,hydrothermal method and subsequent room temperature sulfurization process.The structure and electrochemical performance of the material were studied by XRD,SEM,Raman,BET,EPR and Gamry electrochemical workstation,exploring how do graphene and S doping effect the structure and electrochemical performance of the material.The results show that the composite with graphene greatly improves the conductivity of the material,and S doping introduces more defects into the material,that adjusts the electronic structure of the material and promotes electron transfer,thus improving the electrochemical activity of the material.Especially when the sulfurization time is 2 h,the OER overpotential is only 282 mV at 100 mA/cm2 of current density,and the tafel slope is 70.6 mV/dec.关键词
石墨烯/LDH/S掺杂/缺陷/OER/电催化剂Key words
graphene/LDH/S-doped/defect/OER/electrocatalyst分类
化学化工
