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Engineering core–shell Co_(9)S_(8)/Co nanoparticles on reduced graphene oxide: Efficient bifunctional mott–schottky electrocatalysts in neutral rechargeable Zn–Air batteries

引用

Journal of Energy Chemistry 2022年第5期31卷 113-123页

作者： 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 ChinaQingdao 266100ShandongChina Key Laboratory of Pesticide and Chemical Biology of Ministry of Education Institute of Environmental ChemistryCollege of ChemistryCentral China Normal UniversityWuhan 430079HubeiChina Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina

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 ***,we synthesize the novel“three–in–one”catalyst that engineers core–shell mott–schottky Co_(9)S_(8)/Co heterostructure on the defective reduced graphene oxide(Co_(9)S_(8)/Co–rGO).The Co_(9)S_(8)/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 *** expected,the integrated core–shell mott–schottky Co_(9)S_(8)/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 *** 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.

关键词： Oxygen reduction reaction Oxygen evolution reaction core–shell mott–schottky Defective carbon architecture Neutral Zn–air batteries

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