title: Porous TiO2Nanotubes with Spatially Separated Platinum and CoOxCocatalysts Produced by Atomic Layer Deposition for Photocatalytic Hydrogen Production.
abstract: Efficient separation of photogenerated electrons and holes, and associated surface reactions, is a crucial aspect of efficient semiconductor photocatalytic systems employed for photocatalytic hydrogen production. A new CoOx/TiO2/Pt photocatalyst produced by template-assisted atomic layer deposition is reported for photocatalytic hydrogen production on Pt and CoOxdual cocatalysts. Pt nanoclusters acting as electron collectors and active sites for the reduction reaction are deposited on the inner surface of porous TiO2nanotubes, while CoOxnanoclusters acting as hole collectors and active sites for oxidation reaction are deposited on the outer surface of porous TiO2nanotubes. A CoOx/TiO2/Pt photocatalyst, comprising ultra-low concentrations of noble Pt (0.046 wt %) and CoOx(0.019 wt %) deposited simultaneously with one atomic layer deposition cycle, achieves remarkably high photocatalytic efficiency (275.9 μmol h-1), which is nearly five times as high as that of pristine TiO2nanotubes (56.5 μmol h-1). The highly dispersed Pt and CoOxnanoclusters, porous structure of TiO2nanotubes with large specific surface area, and the synergetic effect of the spatially separated Pt and CoOxdual cocatalysts contribute to the excellent photocatalytic activity.
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Jiankang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Zhuobin
authors.initials: Z
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Huibin
authors.initials: H
authors.lastname: Ge
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Shichao
authors.initials: S
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Chaoqiu
authors.initials: C
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Xili
authors.initials: X
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Meihua
authors.initials: M
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Zhanfeng
authors.initials: Z
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Qin
keywords: atomic layer deposition; charge separation; dual cocatalysts; photocatalytic hydrogen production; porous TiO2 nanotubes