Hierarchical and self-supporting honeycomb LaNi_5 alloy on nickel foam for overall water splitting in alkaline media

作     者：Yanze Wu Yalan Liu Kui Liu Lin Wang Lei Zhang Degao Wang Zhifang Chai Weiqun Shi Yanze Wu;Yalan Liu;Kui Liu;Lin Wang;Lei Zhang;Degao Wang;Zhifang Chai;Weiqun Shi

作者机构：Engineering Laboratory of Advanced Energy MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201ZhejiangChina Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyInstitute of High Energy PhysicsChinese Academy of SciencesBeijing100049China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2022年第7卷第4期

页      面：799-806页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Science Fund for Distinguished Young Scholars(No.21925603) support of the Major Program of the National Natural Science Foundation of China(No.21790373) 

主　　题：Honeycomb alloy Hierarchical structures Molten salt Hydrogen evolution reaction Oxygen evolution reaction 

摘      要：Ni-based metallic foams possessing large specific surfaces and open cell structures are of specific interest as catalysts or catalyst carriers for electrolysis of *** fabrication of Nickel foam limits the element modification choices to several inert transition metals only on polymer foam precursor and subsequent preparation of foam-based catalysts in aqueous solution or organic *** expand the modification horizon,molten salt with wide electrochemical window and fast ion diffusion can achieve the reduction of highly active ***,we reported is a general and facile method to deposit directly of highly reactive element La and prepare hierarchical honeycomb LaNi_(5) alloy on Ni foam(ho-LaNi_(5)/NF).This self-supporting electrode presents excellent electrical coupling and conductivity between the Ni foam and LaNi_(5),which provides a 3D self-supported heterostructure with outstanding electrocatalytic activity and excellent durability for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).It exhibits excellent overpotential(1.86 V)comparable to commercial coupled IrO_(2)//Pt/C(1.85 V)at a high current density of 100 m A cm^(-2).This work may pave the way for fabricating novel 3D self-supported honeycomb alloy that can be applied as electrode for usage of clean energy.