title: Enhancing the Performance of Amorphous-Silicon Photoanodes for Photoelectrocatalytic Water Oxidation.
abstract: Herein, hydrogenated amorphous Si (a-Si:H) covered with a thin layer of CoOx is applied as photoanode for PEC water splitting. The thin layer of CoOx effectively protects a-Si:H from the corrosive electrolyte and quantitative oxidation of water to oxygen was observed. A high applied bias photon-to-current efficiency of 2.34 % was achieved using an intrinsic absorber and an additional p-type layer. This work shows that a-Si:H with a sandwich-like structure, in which each layer has its own functionality, can be applied as an efficient and stable photoanode for PEC water oxidation.
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, China.|Dalian National Laboratory for Clean Energy, Dalian, 116023, China.|University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, China.|Dalian National Laboratory for Clean Energy, Dalian, 116023, China.|University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, China.|Dalian National Laboratory for Clean Energy, Dalian, 116023, China.|University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Yao
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian, 116023, China.
authors.forename: Shubo
authors.initials: S
authors.lastname: Wang
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian, 116023, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian, 116023, China.
authors.forename: Yuexian
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Dalian National Laboratory for Clean Energy, Dalian, 116023, China.
authors.forename: Shengzhong Frank
authors.initials: SF
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian, 116023, China. canli@dicp.ac.cn.|Dalian National Laboratory for Clean Energy, Dalian, 116023, China. canli@dicp.ac.cn.
authors.forename: Can
authors.initials: C
authors.lastname: Li
mesh_terms: D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D006865:Hydrogenation; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D012825:Silicon / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D012825:Silicon
keywords: amorphous silicon; cobalt oxide; electrochemistry; photochemistry; water splitting