Doping-driven dual heterogeneous interfacial structures boosting the durability of industry-compatible water splitting at high current density  

作　　者：Chunming Yang Lihai Zhou Zhijie Kong Xiang Li Wangchuan Zhu Guangqing Wang Yanzhong Zhen Feng Fu Yucang Liang 

机构地区：[1]Research Institute of Comprehensive Energy Industry Technology,College of Chemistry&Chemical Engineering,Yan’an University,Yan’an 716000,China [2]Henan Key Laboratory of Crystalline Molecular Functional Materials,Green Catalysis Center,College of Chemistry,Zhengzhou University,Zhengzhou 450001,China [3]Institut für Anorganische Chemie,Eberhard Karls Universität,Tübingen 72076,Germany

出　　处：《Science China Chemistry》2024年第10期3468-3481,共14页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22162025,22068037);the Youth Innovation Team of Shaanxi Universities;the Open and Innovation Fund of Hubei Three Gorges Laboratory(SK232001);the Regional Innovation Capability Leading Program of Shaanxi(2022QFY07-03,2022QFY07-06);the Shaanxi Province Training Program of Innovation and Entrepreneurship for Undergraduates(S202210719108)。

摘　　要：Developing highly stable electrocatalysts under industry-compatible current densities(>500 mA cm^(-2))in an anion-exchange membrane water electrolyzer(AEMWE)is an enormous challenge for water splitting.Herein,based on the results of density function theory calculations,a dual heterogeneous interfacial structured NiSe/Fe-Ni(OH)_(2)catalyst was subtly designed and successfully prepared by electrodepositing Fe-doped Ni(OH)_(2)on NiSe-loaded nickel foam(NF).Fe doping-driven heterogeneous structures in NiSe/Fe-Ni(OH)_(2)markedly boost catalytic activity and durability at industrially compatible current densities in single hydrogen and oxygen evolution reactions under alkaline conditions.In particular,NiSe/Fe-Ni(OH)_(2)shows a negligible performance loss at 600 mA cm^(-2)at least 1,000 h for overall water splitting,a distinguished long-term durability acting as AEMWE electrodes at 600 mA cm^(-2)and 1 A cm^(-2)at 85℃for at least 95 h.Owing to Fe doping-induced strong synergetic effect between Ni and Fe,dual heterostructure-promoted charge transfer and redistribution,abundant catalytic active sites,and improvement of stability and durability,a mechanism of Fe doping-driven heterogeneous interfacial structurepromoted catalytic performance was proposed.This study provides a successful example of theory-directed catalyst preparation and pioneers a creative strategy for industry-compatible water splitting at high current density.

关 键 词：doping-induced heterojunction structure NiSe/Fe-Ni(OH)_(2) large current density anion-exchange membrane industrycompatible water electrolysis 

分 类 号：TQ116.2[化学工程—无机化工] TQ426