钴碳复合材料的制备及氧还原性能研究  

Preparation of cobalt-carbon composites and study on its oxygen reduction properties

作　　者：张正 严明娇 熊子龙 王世杰 李翠芹[1,2] ZHANG Zheng;YAN Ming-jiao;XIONG Zi-long;WANG Shi-jie;LI Cui-qin(School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Provincial Collaborative Innovation Center for Efficient Utilization of Phosphorus and Fluorine Resources,Guiyang 550025,China)

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]贵州省磷氟资源高效利用协同创新中心,贵州贵阳550025

出　　处：《现代化工》2024年第12期121-128,共8页Modern Chemical Industry

基　　金：含氟电解质及电解液的关键技术开发与示范(黔科合战略找矿[2022]ZD006号);贵州省教育厅自然科学基金项目(黔教技[2022]001号)。

摘　　要：针对锌-空气电池阴极的氧还原反应(ORR)动力学缓慢问题,设计非贵金属与强导电性碳基载体进行复合的催化剂是降低贵金属用量和提高ORR活性的有效途径。通过调节Zn^(2+)和Co^(2+)的摩尔比合成了封装在氮掺杂碳基菱形十二面体中的CoO和金属Co的复合物CoO-Co/NC。结果表明,合成的CoO-Co/NC-1拥有大量的Co—N—C活性位点,使其表现出优异的ORR电催化性能,其性能远优于目前市场上的商业Pt/C(20%)催化剂。此外,当使用CoO-Co/NC-1作为锌-空气电池阴极的催化剂时,该电池展现出1.497 V的开路电压和长达95 h的循环稳定性。In view of the slow kinetics of oxygen reduction reaction(ORR)in the cathode of zinc-air battery,it is an effective way to reduce the dosage of precious metals and improve the ORR activity by designing a catalyst composed of non-noble metals and strong conductive carbon-based carriers.By adjusting the molar ratio of Zn^(2+)to Co^(2+),the complexes between CoO and metal Co encapsulated in N-doped carbon-based rhombic dodecahedrons(CoO-Co/NC)is synthesized.Results show that the synthesized CoO-Co/NC-1 possesses a large number of Co-N-C active sites,making it exhibit excellent electrocatalytic activity for ORR,which is far superior to that of the currently marketed commercial Pt/C(20wt%)catalyst.In addition,as CoO-Co/NC-1 is used as the cathode catalyst of zinc-air battery,the battery exhibits an open circuit voltage of 1.497 V and a cycle stability in 95 h.

关 键 词：氧还原反应 催化剂 氮掺杂碳 锌-空气电池 

分 类 号：TQ426[化学工程] TM911.41[电气工程—电力电子与电力传动]