摘要
采用分步水热法在泡沫镍上制备了铁钴层状氢氧化物多孔催化材料(FeCo-LDH@NF),对材料的微观结构进行了表征,并研究了外加磁场对该催化材料析氧反应(OER)性能的影响。扫描电镜(SEM)和X射线衍射(XRD)测试表明层状氢氧化物负载到泡沫镍基材上。当电流密度达到100mA/cm^(2),189mT的外加磁场可将FeCo-LDH@NF电极的过电位由330mV降低为290mV,塔菲尔斜率由69mV/dec降低为58mV/dec。结果表明:多孔层状氢氧化物的OER催化性能可由外部磁场加强,为提高水分解催化剂的电解效率提供了新策略。
Porous catalytic material FeCo/hydroxide@foamed nickel(FeCo-LDH@NF)was prepared by step-by-step hydrothermal method.The microstructure of the material was characterized,and the effect of external magnetic field on the performance of the catalytic material for oxygen evolving reaction(OER)was investigated.SEM and XRD tests showed that the layered hydroxides were successfully loaded onto the NF substrate.When the current density reached 100 mA/cm^(2),the applied magnetic field of 189 mT can reduce the overpotential of FeCo-LDH@NF electrode from 330 mV to 290 mV,and the Tafel slope from 69 mV/dec to 58 mV/dec.The experimental results demonstrated that the OER catalytic performance of porous layered LDH can be enhanced by an external magnetic field,providing new strategy for improving the electrolysis efficiency of water splitting catalysts.
作者
高凯文
郭静慧
王海人
Gao Kaiwen;Guo Jinghui;Wang Hairen(School of Materials Science and Engineering,Hubei University,Wuhan 430062)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第S01期397-400,共4页
New Chemical Materials
关键词
析氧反应
层状氢氧化物
磁场
电化学催化
oxygen evolution reaction
layered hydroxide
magnetic field
electrochemical catalysis
作者简介
高凯文(1999-),男,硕士研究生,主要从事能源催化材料领域的研究,E-mail:981220400@qq.com;通讯作者:王海人,男,教授,从事电催化材料方面的研究,E-mail:whr9999whr@163.com。
