泡沫镍基三维空心球CoFe_(2)O_(4)@NF复合材料的制备与析氧性能研究  

Research on Preparation and Electrocatalytic Performance for Oxygen Evolution Reaction of 3D Hollow Spherical CoFe_(2)O_(4)@NF Composite Based on Ni Foam

作　　者：王宏智[1] 高琪 苏展[2] 于金山[2] 张卫国[1] 姚素薇[1] Wang Hongzhi;Gao Qi;Su Zhan;Yu Jinshan;Zhang Weiguo;Yao Suwei(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Tianjin Electric Power Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300384,China)

机构地区：[1]天津大学化工学院,天津300350 [2]国网天津市电力公司电力科学研究院,天津300384

出　　处：《化学工业与工程》2021年第2期61-68,共8页Chemical Industry and Engineering

摘　　要：为降低电解水阳极的析氧反应过电位,采用一步水热法制备了泡沫镍基钴铁混合氧化物(CoFe2O4@NF)复合材料。采用XRD、SEM、TEM和XPS等方法对复合材料进行表征,并利用三电极体系对其电解水析氧催化性能进行了测试。结果显示:Co Fe_(2)O_(4)以颗粒的形式聚集成空心球结构生长于泡沫镍基底上,其中空心球的直径大约4μm,而CoFe2O4的粒径约为40 nm左右。在1 mol·L^(-1)KOH溶液中,CoFe_(2)O_(4)@NF复合材料仅需293 mV的过电位即可达到20 m A·cm^(-2)的电流密度,Tafel斜率为51 m V·dec^(-1)。经过1000次循环伏安扫描和10 h电流时间曲线测试后,其析氧性能依旧保持高稳定性,在析氧催化材料领域有着广阔的研究前景。CoFe2O4@NF composite was prepared by a simple one-step hydrothermal method to decrease the overvoltage of oxygen evolution reaction(OER).Its composition and microstructure were analyzed by XRD,SEM,TEM and XPS,and its electrocatalytic performances of oxygen evolution reaction were tested by using a three-electrode system.CoFe2O4 particles gathered into hollow spherical structure and grew on Ni foam(NF)substrate.The diameter of spherical is about 4μm and the size of CoFe_(2)O_(4) particles is 40 nm approximately.In 1 mol·L^(-1) KOH solution,the CoFe_(2)O_(4)@N composite just needs 293 mV overpotential to reach the current density of 20 m A·cm-2 with the Tafel slope of 51 m V·dec^(-1).In addition,after 1000 CVs and 10 h I-t test,the electrocatalytic performance for OER of CoFe_(2)O_(4)@N composite still remains high stability,which proves that the composite has a broad research prospect in the field of OER catalytic materials.

关 键 词：钴铁混合氧化物 泡沫镍 三维空心球结构 析氧催化反应 

分 类 号：TM912[电气工程—电力电子与电力传动]