MOF-derived Co-MOF,O-doped carbon as trifunctional electrocatalysts to enable highly efficient Zn-air batteries and water-splitting  

作　　者：Xinde Duan Na Pan Can Sun Kexin Zhang Xukun Zhu Mingdao Zhang Li Song Hegen Zheng 

机构地区：[1]School of Environmental Science and Engineering,Nanjing University of Information Science&Technology,Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing 210044,Jiangsu,China [2]State Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210023,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2021年第5期290-298,共9页能源化学（英文版）

基　　金：funded by grants from the Natural Science Foundation of China(21771101);supported by Jiangsu Cyan Engineering of Higher Education;Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD);Jiangsu Joint Laboratory of Atmospheric Pollution Control;Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials。

摘　　要：Development of high-efficiency non-noble electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is urgently needed for high-performance Zn-air batteries and overall water splitting.Here,a facile strategy to synthesize novel Co-MOF,O-doped carbon(Co-MOF-T)based on Zn,Co-doped glucosamine and ZIF-8 by pyrolysis at temperature T was demonstrated.The prepared Co-MOF-800 showed a superior oxygen reduction reaction(ORR)activity comparable to that of commercial Pt/C catalyst.In addition,this catalyst shows great potential in the overall water splitting due to the excellent oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)activities.Based on the trifunctional activity,the primary Zn-air batteries using a Co-MOF-800 air electrode achieved a high open-circuit voltage of 1.38 V,a specific capacity of 671.6 mAh g^(-1) Zn,and a prominent peak power density of 144 mW cm^(-2).Also,the rechargeable Zn-air batteries based on CoMOF-800 air electrode could be smoothly run for 510 cycles with a low voltage gap of 0.58 V.Finally,the trifunctional Co-MOF-800 catalyst was applied to boost the electrochemical water splitting,demonstrating its promising potential as a green energy material for practical applications.

关 键 词：Metal-organic frameworks Carbon catalysts Trifunctional electrocatalyst Metal-air batteries Water splitting 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ116.2[化学工程—无机化工] TQ426