铈掺杂ZIF-67的制备及电催化析氧性能  

Preparation of cerium-doped ZIF-67 for electrocatalytic oxygen evolution performance

作　　者：吕章怡 袁近秋 毕明春 梁宇宁 高彦华[1] 陈颖[1] LüZhangyi;YUAN Jinqiu;BI Mingchun;LIANG Yuning;GAO Yanhua;CHEN Ying(College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318

出　　处：《化工科技》2024年第5期43-47,共5页Science & Technology in Chemical Industry

基　　金：黑龙江省自然科学基金项目(LH2023B006)。

摘　　要：以六水合硝酸钴、六水合硝酸铈为金属离子,2-甲基咪唑为有机配体,十六烷基三甲基溴化铵为形貌调节剂,通过一步法在水溶剂中制备掺杂不同x(Ce)的Ce-ZIF-67纳米立方体(Ce-ZIF-67 NCs)。结果表明,5%Ce-ZIF-67 NCs为最佳电催化剂,电流密度为10 mA/cm^(2)时的过电位为363 mV,电子转移电阻为178.77Ω。Ce的掺杂具有良好的离子电导率和可逆的表面氧离子交换能力,优化Co位点的电子结构,进而提升ZIF-67 NCs的析氧性能。Using cobalt and cerium nitrate hexahydrate as the metal ions,2-methylimidazole as the organic ligand,and cetyltrimethylammonium bromide as the shape modifier,Ce-ZIF-67 nanocubes(Ce-ZIF-67 NCs)doped with varying Ce contents were prepared by a single step in an aqueous solvent.The results showed that 5%Ce-ZIF-67 NCs was the best electrocatalyst with an overpotential of 363 mV at a current density of 10 mA/cm^(2).The electron transfer resistance was 178.77Ω.The doping of Ce has good ionic conductivity and reversible surface oxygen ion exchange ability,which optimizes the electronic structure of Co sites and thus enhances the oxygen evolution reaction performance of ZIF-67 NCs.

关 键 词：金属有机框架 掺杂 电催化 析氧反应 

分 类 号：O643.3[理学—物理化学]