Triggering heteroatomic interdiffusion in one-pot-oxidation synthesized NiO/CuFeO_(2) heterojunction photocathodes for efficient solar hydrogen production from water splitting

作     者：Fei Han Wei Xu Chun-Xu Jia Xiang-Tao Chen Ying-Peng Xie Chao Zhen Gang Liu Fei Han;Wei Xu;Chun-Xu Jia;Xiang-Tao Chen;Ying-Peng Xie;Chao Zhen;Gang Liu

作者机构：Key Laboratory of Resources Chemicals and Materials(Shenyang University of Chemical Technology)Ministry of EducationShenyang 110142China Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)Northeastern UniversityShenyang 110819China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第3期

页      面：853-861页

核心收录：

学科分类：081702[工学-化学工艺] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Key Research and Development Program of China(No.2021YFA1500800) the National Natural Science Foundation of China(Nos.51825204,52072377,521888101 and 51402199) the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2020192) the International Partnership Program of Chinese Academy of Sciences(No.174321KYSB20200005) China Postdoctoral Science Foundation(No.2017M621137) Liaoning Revitalization Talents Program(No.XLYC2007193) the Natural Science Foundation of Liaoning Province(Nos.2021-MS-014 and 2021NLTS1210) the University Innovation Talent Foundation of Liaoning Province(No.LR2018074) the State Key Laboratory of Fine Chemicals,Dalian University of Technology(No.KF1708)。 

主　　题：Photoelectrochemical(PEC)water splitting NiO/CuFeO_(2)hybrid photocathode Heteroatomic interdiffusion 

摘      要：Delafossite CuFeO_(2) is a promising photocathode material for cost-efficiently photoelectrochemical(PEC)water splitting,but the unfavorable conductivity and fast recombination dynamics of photogenerated carriers limit its PEC activity for water reduction.Here,we developed a heterostructure photocathode consisting of the Cu-doped NiO(Cu:NiO)hole selective layer(HSL)and Ni-doped CuFeO_(2)(Ni:CuFeO_(2))active layer by simply annealing a homogeneous Cu-Fe oxalate layer grown on the Ni film deposited on the fluorine doped tin oxide(FTO)substrate.The obtained heterostructure of Cu:NiO/Ni:CuFeO_(2) with enhanced charge carrier transportability and high-quality interface greatly promotes the separation of photogenerated carriers.Accordingly,the Cu:NiO/Ni:CuFeO_(2) photocathode exhibits a high photocurrent density of~0.9 mA·cm^(-2 )at 0.2 V(vs.reversible hydrogen electrode,RHE),outperforming most of the reported bare CuFeO_(2) photocathodes in the literature.And the photocurrent density can be further improved to 1.2 mA·cm^(-2) after decorating NiSx cocatalyst.