电沉积制备镍钴基硒化物及其电催化氧化尿素的性能  

Study on electrodeposition of Nickel⁃cobalt selenides andelectrocatalytic oxidation of urea

作　　者：张婉婷 冯忠宝 刘文涛 石彤彤 庄艳歆[1] Zhang Wanting;Feng Zhongbao;Liu Wentao;Shi Tongtong;Zhuang Yanxin(Northeastern University Key Laboratory of Ministry of Education Electromagnetic Process Materials Research,Shenyang 110819,China;Northeastern University School of Metallurgy,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,沈阳110819 [2]东北大学冶金学院,沈阳110819

出　　处：《材料与冶金学报》2023年第5期471-477,共7页Journal of Materials and Metallurgy

基　　金：国家自然科学基金项目(51904060)。

摘　　要：开发具有优良电催化活性和稳定性的非贵金属催化剂是尿素燃料电池发展的迫切要求.以泡沫镍为基体,采用一步电沉积法制备出具有纳米网状结构的镍钴基硒化物(Ni-Co-Se)电催化剂,并研究了其电催化氧化尿素的性能.结果表明:制备所得的电催化剂具有优异的电化学性能,在电流密度10 mA/cm~2的条件下,其尿素氧化电位为1.351 V(vs.RHE),当电流密度增大至100 mA/cm~2时,尿素氧化电位为1.398 V(vs.RHE),塔菲尔斜率为48.65 mV/dec;在电流密度10 mA/cm~2的条件下,该电催化剂10 h后仍能保持初始催化活性的80%;Ni-Co-Se电催化剂的电化学活性比表面积(93.31 mF/cm~2)较大,电子导电性(R_(ct)=294Ω)良好.The development of non⁃noble metal catalysts with excellent electrocatalytic activity and stability is an urgent requiement for urea fuel cells.In this paper,nickel cobalt selenide(Ni⁃Co⁃Se)electrocatalyst with nanometer reticular structure was prepared by one⁃step electrodeposition on nickel foam(NF).The prepared Ni⁃Co⁃Se electrocatalyst has excellent electrochemical performance.The oxidation potential of urea is 1.351 V vs.RHE at the current density of 10 mA/cm^(2),and 1.398 V(vs.RHE)when the current density increases to 100 mA/cm^(2).The Tafel slope of prepared Ni⁃Co⁃Se is 48.65 mV/dec.It can be seen that 80%of the initial catalytic activity can be maintained after 10 hours at the current density of 10 mA/cm^(2).The good catalytic activity and stability of Ni⁃Co⁃Se are mainly related to its large electrochemical activity specific surface area(93.31 mF/cm^(2))and good electronic conductivity(Rct=294Ω).

关 键 词：电沉积 Ni-Co-Se 燃料电池 尿素氧化 电催化 

分 类 号：TQ426.82[化学工程]