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  • Surface Engineering to Reduce the Interfacial Resistance for Enhanced Photocatalytic Water Oxidation

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    Embargoed until: 2021-07-10
    File version
    Accepted Manuscript (AM)
    Author(s)
    Yan, Junqing
    Liu, Jing
    Ji, Yujin
    Batmunkh, Munkhbayar
    Li, Dan
    Liu, Xiaoshuang
    Cao, Xingzhong
    Li, Youyong
    Liu, Shengzhong
    Ma, Tianyi
    Griffith University Author(s)
    Batmunkh, Munkhbayar
    Year published
    2020
    Metadata
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    Abstract
    Interfacial resistance of the charge carriers across TiO2 to cocatalysts is one of the main limiting factors for realizing high photocatalytic efficiency of water oxidation. Herein, an amorphous TiOx layer is introduced on the surface of crystalline TiO2 catalyst to form the core–shell structure (am@TiO2) via an oxidation corrosion method. Owing to the surface disordered Ti–O layer, the obtained am@TiO2 exposes abundant −OH groups for the homogeneous loading of nanosized IrOx, while the charge carrier interfacial migration is substantially enhanced. The as-prepared IrOx-am@TiO2 exhibits photocatalytic water oxidation performance ...
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    Interfacial resistance of the charge carriers across TiO2 to cocatalysts is one of the main limiting factors for realizing high photocatalytic efficiency of water oxidation. Herein, an amorphous TiOx layer is introduced on the surface of crystalline TiO2 catalyst to form the core–shell structure (am@TiO2) via an oxidation corrosion method. Owing to the surface disordered Ti–O layer, the obtained am@TiO2 exposes abundant −OH groups for the homogeneous loading of nanosized IrOx, while the charge carrier interfacial migration is substantially enhanced. The as-prepared IrOx-am@TiO2 exhibits photocatalytic water oxidation performance with an O2 evolution rate of 143.6 μmol/g·h, which is approximately 14 times higher than that of the bare am@TiO2. Moreover, an apparent quantum yield (AQY) of 18.99% is obtained under LED-405 illumination. This work provides a direction for improving the photocatalytic performance and helps to gain a fundamental understanding of the water oxidation steps.
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    Journal Title
    ACS Catalysis
    Volume
    10
    Issue
    15
    DOI
    https://doi.org/10.1021/acscatal.0c02063
    Copyright Statement
    This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Catalysis, © 2020 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acscatal.0c02063
    Subject
    Inorganic Chemistry
    Organic Chemistry
    Chemical Engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Chemistry
    TiO2
    Publication URI
    http://hdl.handle.net/10072/397547
    Collection
    • Journal articles

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