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  • Active sites on hydrogen evolution photocatalyst

    Author(s)
    Xing, Jun
    Jiang, Hai Bo
    Chen, Jian Fu
    Li, Yu Hang
    Wu, Long
    Yang, Shuang
    Zheng, Li Rong
    Wang, Hai Feng
    Hu, P
    Zhao, Hui Jun
    Yang, Hua Gui
    Griffith University Author(s)
    Zhao, Huijun
    Year published
    2013
    Metadata
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    Abstract
    Solar hydrogen production assisted with semiconductor materials is a promising way to provide alternative energy sources in the future. Such a photocatalytic reaction normally takes place on the active sites of the catalysts surface, and the identification of the active sites is crucial for understanding the photocatalytic reaction mechanism and further improving the photocatalytic efficiency. However, the active sites of model catalysts are still largely disputed because of their structural complexity. Conventionally, H2 evolution from solar water splitting over Pt/TiO2 is widely deemed to take place on metallic Pt ...
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    Solar hydrogen production assisted with semiconductor materials is a promising way to provide alternative energy sources in the future. Such a photocatalytic reaction normally takes place on the active sites of the catalysts surface, and the identification of the active sites is crucial for understanding the photocatalytic reaction mechanism and further improving the photocatalytic efficiency. However, the active sites of model catalysts are still largely disputed because of their structural complexity. Conventionally, H2 evolution from solar water splitting over Pt/TiO2 is widely deemed to take place on metallic Pt nanoparticles. Oppositely, we report through a combined experimental and theoretical approach, that metallic Pt nanoparticles have little contribution to the activity of photocatalytic H2 evolution; the oxidized Pt species embedded on the TiO2 surface are the key active sites and primarily responsible for the activity of the hydrogen evolution Pt/TiO2 photocatalyst.
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    Journal Title
    Journal of Materials Chemistry A: materials for energy and sustainability
    Volume
    1
    Issue
    45
    DOI
    https://doi.org/10.1039/c3ta13167j
    Subject
    Inorganic green chemistry
    Macromolecular and materials chemistry
    Electrochemistry
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/56481
    Collection
    • Journal articles

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