摘要
开发用于水分解的高效稳定、低成本非贵金属电催化剂,特别是在同一电解质中对阴极的析氢反应(HER)和阳极的析氧反应(OER)都具有高效作用的电催化剂是一项挑战。以六水合硝酸钴、尿素、氟化铵和硒粉为原料,采用水热和高温固相法在镍网(NF)上原位构筑了CoSe_(2)@NF,采用XRD、XPS、SEM和TEM对CoSe_(2)@NF进行了物相分析和形貌表征,并在碱性电解液中对CoSe_(2)@NF的HER和OER性能进行了测试。结果表明,表面粗糙的串珠状纳米线结构极大地增加了CoSe_(2)有效活性位点的数量。该催化电极在OER和HER中均表现出高而稳定的催化活性。将CoSe_(2)@NF作为全解水槽的阴阳极,在1.60 V槽电压下即可产生10 mA/cm^(2)的电流。
It is of great challenge in development of highly effective,stable and low-cost non-noble-metal electrocatalysts for water splitting,especially those that can efficiently catalyze both hydrogen evolution reaction(HER)at cathode and oxygen evolution reaction(OER)at anode in the same electrolyte.In the current research,CoSe_(2)@NF was synthesized in-situ on nickel foam(NF)with cobalt nitrate hexahydrate,urea,ammonium fluoride and selenium powder via hydrothermal and solid state process.The phase and morphology of CoSe_(2)@NF were then characterized by XRD,XPS,SEM and TEM,followed by analyses of its OER and HER properties in alkaline solution.The results showed that the specific surface area and effective active site number of the catalyst obtained were greatly increased by the bead-like structure with rough surface.Moreover,CoSe_(2)/NF exhibited high and stable catalytic activity in both the HER and OER in alkaline solution.The water cell equipped with CoSe_(2)@NF as both cathode and anode could generate a current of 10 mA/cm^(2)at a 1.60 V voltage.
作者
邹祥宇
贾飞宏
卫学玲
包维维
艾桃桃
郭宇晨
ZOU Xiangyu;JIA Feihong;WEI Xueing;BAO Weiweit;AI Taotao;GUO Yuchen(School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第11期2235-2240,共6页
Fine Chemicals
基金
国家自然科学基金青年科学基金(51504147)。
关键词
电催化
双功能催化剂
析氧反应
析氢反应
全解水
功能材料
electrocatalysis
bifunctional catalysts
oxygen evolution reaction(OER)
hydrogen evolution reaction(HER)
overall water splitting
functional materials
