摘要
析氧反应(oxygen evolution reaction,OER)电催化剂存在成本高、效率低等问题。OER是一个需要高过电位的四电子-质子耦合反应,为了降低电解水阳极的OER过电位和提高钴铁氧化物(CoFe_(2)O_(4))的电流密度和稳定性,采用简单的水浴和煅烧的方法制备不同煅烧温度的非贵金属催化剂CoFe_(2)O_(4)。采用XRD、SEM、TGA等方法对CoFe_(2)O_(4)材料进行表征,电化学研究结果表明,在1 mol/L KOH溶液中,经过300℃煅烧的CoFe_(2)O_(4)OER性能最好,1.58 V时就可以产生10 mA/cm;的电流密度,塔菲尔(Tafel)斜率为96 mV/dec,经过1000次循环伏安扫描和计时电流进行稳定性测试后,其析氧性能依然保持较高的稳定性。
Oxygen evolution reaction(OER)electrocatalysts suffer from high cost and low efficiency.OER is a four electron-proton coupling reaction,which requires higher overpotential.To reduce the overpotential of OER of electrolytic water anode and improve the current density and stability of CoFe_(2)O_(4),a simple water bath and calcination method is adopted to improve OER by preparing CoFe_(2)O_(4)with different calcination temperatures as a non-noble metal catalyst.The materials were characterized by XRD,SEM and TGA,and the electrochemical results illustrate that CoFe_(2)O_(4)calcined at 300℃has the optimal OER performance in 1mol/L KOH solution,which can produce a current density of 10 mA/cm~2 at 1.58 V,and the Tafel slope is 96 mV/dec,after 1000 cyclic voltammetry scans or current-time tests,its OER performance still maintains high stability.
作者
李淑敏
吴鹏
陈艺哲
林东海
LI Shumin;WU Peng;CHEN Yizhe;LIN Donghai(School of Energy and Materials,Shanghai Polytechnic University,Shanghai 201209,China;Research Center of Advanced Thermal Functional Materials,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai Polytechnic University,Shanghai 201209,China)
出处
《上海第二工业大学学报》
2022年第2期142-149,共8页
Journal of Shanghai Polytechnic University
基金
上海市高等学校特聘教授(东方学者)(A30DB212103)
上海市科委扬帆计划(17YF1406600)
上海市教委晨光计划(18CG68)
上海先进热功能材料工程技术研究中心、上海市材料科学与工程高原学科资助。
关键词
析氧反应
电催化剂
钴铁氧化物
煅烧温度
oxygen evolution reaction
electrocatalyst
cobalt iron oxide
calcination temperature
