石油化工高等学校学报2024，Vol.37Issue(4)：57-65,9.DOI:10.12422/j.issn.1006-396X.2024.04.008
Cu掺杂WN松枝状自支撑纳米阵列的制备及其碱性析氢性能的研究
Preparation of Cu-Doped WN Nanoarrays and Study on Their Hydrogen Evolution Performance
摘要
Abstract
Using ammonium metatungstate and copper acetate as raw materials,the precursors with different morphology were synthesized by a simple hydrothermal method by controlling the doping ratio.Then,combined with high temperature annealing method,the in-situ growth of Cu-WN-5∶1 was successfully realized on carbon paper.The morphology and structure of the samples were characterized by SEM,TEM,XRD and XPS,and then the hydrogen evolution performance of the catalyst was evaluated by electrochemical testing methods.The results show that the doping ratio of W and Cu(n(W)/n(Cu))has a significant effect on the hydrogen evolution performance of the catalyst,in which the optimal hydrogen precipitation activity is achieved when n(W)/n(Cu)is 5∶1.The successful doping of Cu increases the number of active sites by changing the electronic structure of WN,accelerates the charge transfer rate in the catalytic process,which in turn improves the HER activity of the material.The required overpotential of Cu-WN-5∶1 at 1.0 mol/L KOH with a current density of 10 mA/cm2 is 195 mV,and the Tafel slope is 192 mV/dec,which indicates that Cu-WN-5∶1 has a fast kinetic rate of electrochemical hydrogen precipitation reaction;the material has been continuously reacted for 36 h under the condition of 1.0 mol/L KOH,and it exhibits excellent long-term stability.关键词
氮化钨/过渡金属掺杂/碱性析氢/电催化/阵列结构Key words
Tungsten nitride/Transition metal doping/Alkaline electrocatalytic hydrogen evolution/Electrocatalysis/Array structures分类
化学化工引用本文复制引用
李乐乐,申丽莎,涂志明,卢卓信,谭弘毅,杨轶,闫常峰..Cu掺杂WN松枝状自支撑纳米阵列的制备及其碱性析氢性能的研究[J].石油化工高等学校学报,2024,37(4):57-65,9.基金项目
国家自然科学基金项目(52276222) （52276222）
中国科学院国际伙伴计划项目(118GJHZ2022029MI) （118GJHZ2022029MI）
广州市科技计划项目(2024A04J4818,202103040002,202206050003) （2024A04J4818,202103040002,202206050003）
安徽省重点研发项目(2023t07020022). （2023t07020022）
