It is significant for the rational construction of the high-efficient bifunctional electrocatalysts for in-depth understandings of how to improve the electron transfer and ion/oxygen transport in catalyzing oxygen reduction reaction and oxygen evolution reaction(ORR and OER),but still full of vital challenges.Herein,we synthesize the novel"three-in-one"catalyst that engineers core-shell Mott-Schottky Co9S8/Co heterostructure on the defective reduced graphene oxide(Co9S8/Co-rGO).The CO9S8/Co-rGO catalyst exhibits abundant Mott-Schottky heterogeneous-interfaces,the well-defined core-shell nanostructure as well as the defective carbon architecture,which provide the multiple guarantees for enhancing the electron transfer and ion/oxygen transport,thus boosting the catalytic ORR and OER activities in neutral electrolyte.As expected,the integrated core-shell Mott-Schottky Co9S8/Co-rGO catalyst delivers the most robust and efficient rechargeable ZABs performance in neutral solution electrolytes accompanied with a power density of 59.5 mW cm-2 and superior cycling stability at 5 mA cm-2 over 200 h.This work not only emphasizes the rational designing of the high-efficient bifunctional oxygen catalysts from the fundamental understanding of accelerating the electron transfer and ion/oxygen transport,but also sheds light on the practical application prospects in more friendly environmentally neutral rechargeable ZABs.

Xingkun Wang;Guangming Zhan;Yurou Wang;Yan Zhang;Jian Zhou;Ren Xu;Huiyu Gai;Huanlei Wang;Heqing Jiang;Minghua Huang

School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,Shandong,China;Key Laboratory of Pesticide and Chemical Biology of Ministry of Education,Institute of Environmental Chemistry,College of Chemistry,Central China Normal University,Wuhan 430079,Hubei,China;Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,Shandong,China

能源化学

[1]Xingkun Wang;Guangming Zhan;Yurou Wang;Yan Zhang;Jian Zhou;Ren Xu;Huiyu Gai;Huanlei Wang;Heqing Jiang;Minghua Huang-.Engineering core-shell Co9S8/Co nanoparticles on reduced graphene oxide:Efficient bifunctional Mott-Schottky electrocatalysts in neutral rechargeable Zn-Air batteries)[J].能源化学,2022(05):113-123

CO9S8

Engineering,core,shell,Co9S8,nanoparticles,reduced,graphene,oxide,Efficient,bifunctional,Mott,Schottky,electrocatalysts,neutral,rechargeable,Air,batteries,It,significant,rational,construction,high,efficient,depth,understandings,how,improve,electron,transfer,oxygen,transport,catalyzing,reduction,reaction,evolution,ORR,OER,but,still,full,vital,challenges,Herein,synthesize,novel,three,one,that,engineers,heterostructure,defective,rGO,exhibits,abundant,heterogeneous,interfaces,well,defined,nanostructure,carbon,architecture,which,provide,multiple,guarantees,enhancing,thus,boosting,catalytic,activities,expected,integrated,delivers,most,robust,ZABs,performance,solution,electrolytes,accompanied,power,density,mW,superior,cycling,stability,mA,over,This,work,not,only,emphasizes,designing,from,fundamental,accelerating,also,sheds,light,practical,application,prospects,more,friendly,environmentally

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