WO_(3)@Fe_(2)O_(3) Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting

作     者：Guobing Mao Heng Wu Tianyang Qiu Dingjie Bao Longjie Lai Wenguang Tu Qi Liu Guobing Mao;Heng Wu;Tianyang Qiu;Dingjie Bao;Longjie Lai;Wenguang Tu;Qi Liu

作者机构：School of Materials Science and EngineeringAnhui Polytechnic UniversityWuhuAnhui 241000China School of Mechanical EngineeringAnhui Institute of Information TechnologyWuhuAnhui 241100China Key Laboratory of Modern Acoustics(MOE)Institute of AcousticsSchool of PhysicsEco-materials and Renewable Energy Research Center(ERERC)National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory for Nano Tech-nologyNanjing UniversityNanjing 210093China School of Science and EngineeringThe Chinese University of Hong KongShenzhenGuangdong 518172China 

出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学（英文）)

年 卷 期：2022年第41卷第8期

页      面：25-30页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Natural Science Foundation of Anhui Province (No. 2008085ME132) Talent Project of Anhui Province (Z175050020001) the Key Project of Anhui Provincial Department of Education (No. KJ2019A0157) the Program from Guangdong Introducing Innovative and Enterpreneurial Teams (Nos. 2019ZT08L101 and RCTDPT-2020-001) the Shenzhen Natural Science Foundation (No. GXWD20201231105722002-20200824163747001) Shenzhen Key Laboratory of Ecomaterials and Renewable Energy (No. ZDSYS20200922160 400001) 

主　　题：host/guest photoelectrodes WO_(3) a-Fe_(2)O_(3) core-shell nanostructures one-dimensional nanoarray 

摘      要：Photoelectrochemical(PEC) hydrogen production from water splitting is a green technology to convert solar energy into renewable hydrogen fuel. The construction of host/guest architecture in semiconductor photoanodes has been proven to be an effective strategy to improve solar-to-fuel conversion efficiency. In this study, WO_(3)@Fe_(2)O_(3) core-shell nanoarray heterojunction photoanodes are synthesized from the in-situ decomposition of WO_(3)@Prussian blue(WO_(3)@PB) and then used as host/guest photoanodes for photoelectrochemical water splitting, during which Fe_(2)O_(3) serves as guest material to absorb visible solar light and WO_(3) can act as host scaffolds to collect electrons at the contact. The prepared WO_(3)@Fe_(2)O_(3) shows the enhanced photocurrent density of 1.26 m A cm^(-2)(under visible light) at 1.23 V. vs RHE and a superior IPEC of 24.4% at 350 nm, which is higher than that of WO_(3)@PB and pure WO_(3)(0.43 m A/cm^(-2) and 16.3%, 0.18 m A/cm^(-2) and 11.5%) respectively, owing to the efficient light-harvesting from Fe_(2)O_(3) and the enhanced electron-hole pairs separation from the formation of type-Ⅱ heterojunctions, and the direct and ordered charge transport channels from the one-dimensional(1D) WO_(3) nanoarray nanostructures. Therefore, this work provides an alternative insight into the construction of sustainable and cost-effective photoanodes to enhance the efficiency of the solar-driven water splitting.