MOFs衍生过渡金属氧化物材料的制备及其氧析出性能研究  

Preparation of transition metal oxides derived MOFs and oxygen evolution properties

作　　者：冯婷 王芳[3] 姜建辉 FENG Ting;WANG Fang;JIANG Jianhui(Engineering Laboratory of Chemical Resources Utilization in South Xinjiang,Xinjiang Production&Construction Corps.Alar,Xinjiang 843300;College of Life Sciences,Tarim University,Alar,Xinjiang 843300;School of Environmental Engineering and Chemistry,Luoyang Institute of Science and Technology,Luoyang,Henan 471000)

机构地区：[1]新疆兵团南疆化工资源利用工程实验室,新疆阿拉尔843300 [2]塔里木大学生命科学学院,新疆阿拉尔843300 [3]洛阳理工学院环境工程与化学学院,河南洛阳471000

出　　处：《塔里木大学学报》2021年第1期56-65,共10页Journal of Tarim University

基　　金：南疆化工重点实验室开放课题“量子点掺杂天然蛭石复合催化剂及其可见光催化分解水制氢性能研究”(CRUZD1802);北京化工大学-塔里木大学联合项目“基于天然蛭石的三维自支撑硅基高性能锂离子电池负极材料的研究”(ZZ1703)。

摘　　要：以ZIF-8@ZIF-67为模板,硝酸镍和硝酸铁为镍来源和铁来源,利用金属的水解作用和低温氧化策略制备三种不同催化剂NiCo_(2)O_(4)、CoFe_(2)O_(4)和NiCo_(2)O_(4)/CoFe_(2)O_(4)复合物。采用X-射线衍射(X-ray diffraction,XRD)、扫描电镜(Scanning electron micro-scope,SEM)检测手段表征材料的微观形貌和组成。在0.10 mol/L KOH介质中进行氧析出(Oxygen evolution reaction,OER)催化性能探究,结果表明:NiCo_(2)O_(4)/CoFe_(2)O_(4)复合物在碱性介质中表现出较低Tafel值(59.58 m V·dec^(-1))和初始电位,阻抗测试结果表明其具有更加优异的导电性。NiCo_(2)O_(4)/CoFe_(2)O_(4)复合物较高的OER催化活性来自于混价过渡金属氧化物的催化活性和它们之间相互协同作用,以及多孔结构和大的比表面积为电子和离子传输提供通道。The precursor of ZIF-8@ZIF-67 is served as template and Ni(NO3)2·6 H2O and Fe(NO3)3·9H2O as metal resource to prepare three different catalysts NiCo_(2)O_(4),CoFe_(2)O_(4) and NiCo_(2)O_(4)/CoFe_(2)O_(4) by utilizing hydrolysis of metals and low temperature oxidation strategy.XRD and SEM were used to characterize the microstructure and composition of the materials.The OER catalytical performance was investigated under 0.10 mol/L KOH.The results show that NiCo_(2)O_(4)/CoFe_(2)O_(4) exhibits lower Tafel value(59.58 mV·dec^(-1))and initial potential.The EIS test results show that NiCo_(2)O_(4)/CoFe_(2)O_(4) has better conductivity than others.The good catalytic activity is due to the catalytic activity of mixed valence metal oxides and their synergistic effect,as well as the porous structure and large specific surface area providing fast channels for electrons and ions transport.

关 键 词：NiCo_(2)O_(4)/CoFe_(2)O_(4) MOFS 氧析出 过渡金属氧化物 

分 类 号：O643.36[理学—物理化学]