Duplex Interpenetrating-Phase FeNiZn and FeNi_(3)Heterostructure with Low-Gibbs Free Energy Interface Coupling for Highly Efficient Overall Water Splitting

作     者：Qiuxia Zhou Caixia Xu Jiagang Hou Wenqing Ma Tianzhen Jian Shishen Yan Hong Liu Qiuxia Zhou;Caixia Xu;Jiagang Hou;Wenqing Ma;Tianzhen Jian;Shishen Yan;Hong Liu

作者机构：Institute for Advanced Interdisciplinary Research(iAIR)Spintronics InstituteCollaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022People’s Republic of China School of Medical Information and EngineeringSouthwest Medical UniversityLuzhou 646000People’s Republic of China Kyiv College at Qilu University of TechnologyQilu University of TechnologyShandong Academy of SciencesJinan 250353People’s Republic of China State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2023年第15卷第7期

页      面：72-89页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by National Science Foundation of China(52201254) Shandong Province(ZR2020MB090,ZR2020QE012) the project of“20 Items of University”of Jinan(202228046)。 

主　　题：Heterostructure Interface effect Dealloying Bifunctional electrocatalyst Overall water splitting 

摘      要：The sluggish kinetics of both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)generate the large overpotential in water electrolysis and thus high-cost hydrogen production.Here,multidimensional nanoporous interpenetrating-phase FeNiZn alloy and FeNi_(3)intermetallic heterostructure is in situ constructed on NiFe foam(FeNiZn/FeNi_(3)@NiFe)by dealloying protocol.Coupling with the eminent synergism among specific constituents and the highly efficient mass transport from integrated porous backbone,FeNiZn/FeNi_(3)@NiFe depicts exceptional bifunctional activities for water splitting with extremely low overpotentials toward OER and HER(η_(1000)=367/245 mV)as well as the robust durability during the 400 h testing in alkaline solution.The as-built water electrolyzer with FeNiZn/FeNi_(3)@NiFe as both anode and cathode exhibits record-high performances for sustainable hydrogen output in terms of much lower cell voltage of 1.759 and 1.919 V to deliver the current density of 500 and 1000 mA cm^(-2)as well long working lives.Density functional theory calculations disclose that the interface interaction between FeNiZn alloy and FeNi_(3)intermetallic generates the modulated electron structure state and optimized intermediate chemisorption,thus diminishing the energy barriers for hydrogen production in water splitting.With the merits of fine performances,scalable fabrication,and low cost,FeNiZn/FeNi_(3)@NiFe holds prospective application potential as the bifunctional electrocatalyst for water splitting.