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 

机构地区：[1]Key Laboratory of Resources Chemicals and Materials(Shenyang University of Chemical Technology),Ministry of Education,Shenyang 110142,China [2]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [3]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [4]Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China

出　　处：《Rare Metals》2023年第3期853-861,共9页稀有金属（英文版）

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)。

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.

关 键 词：Photoelectrochemical(PEC)water splitting NiO/CuFeO_(2)hybrid photocathode Heteroatomic interdiffusion 

分 类 号：TQ116.2[化学工程—无机化工]