Heterostructure engineering of electrocatalysts provides a fascinating platform to reasonably manipulate the physicochemical properties of nanomaterials and further improve their catalytic efficiency for water electrolysis.However,it still remains a huge challenge to construct well-designed core-shell heterostructured catalysts and identify the key role of components for synergistic catalysis.Herein,a melted polymeric salt tactics was innovatively developed to synthesize heterostructured Ni@Ni(OH)2 core-shell nanomaterials supported on porous carbon(named Ni@Ni(OH)2/PC),wherein well-defined Ni(OH)2-Ni heterostructure plays a pivotal role in improving electrocatalytic activity for water reduction and oxidation.Besides,the stable porous carbon support functions as a highway for continuous electron transfer between Ni and Ni(OH)2,and simultaneously enables the full exposure of accessible active sites.The fabricated Ni@Ni(OH)2/PC exhibits outstanding bifunctional electrocatalytic performance for overall water splitting(η10 =1.55 V)with a good long-time stability.This work sheds new light on the design of engineering heterostructure of active bifunctional electrocatalysts for efficient energy conversion system.

Jun-Wei Zhang;Xian-Wei Lv;Tie-Zhen Ren;Zheng Wang;Teresa J.Bandosz;Zhong-Yong Yuan

Hebei Provincial Key Laboratory of Green Chemical Technology&High Efficient Energy Saving,School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin,300130,China;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),School of Materials Science and Engineering,Nankai University,Tianjin,300350,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan,750021,Ningxia,China;Department of Chemistry and Biochemistry,The City College of New York,NY,10031,USA

绿色能源与环境（英文）

[1]Jun-Wei Zhang;Xian-Wei Lv;Tie-Zhen Ren;Zheng Wang;Teresa J.Bandosz;Zhong-Yong Yuan-.Engineering hetero structured Ni@Ni(OH)2 core-shell nanomaterials for synergistically enhanced water electrolysis)[J].绿色能源与环境（英文）,2022(05):1024-1032

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