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  • Local coulomb attraction for enhanced H-2 evolution stability of metal sulfide photocatalysts

    Author(s)
    Zhao, Jun Jie
    Li, Yu Hang
    Liu, Peng Fei
    Wang, Yu Lei
    Du, Xu Lei
    Wang, Xue Lu
    Zeng, Hui Dan
    Zheng, Li Rong
    Yang, Hua Gui
    Griffith University Author(s)
    Yang, Huagui
    Year published
    2018
    Metadata
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    Abstract
    Cadmiun sulfide (CdS) is considered as a promising semiconductor photocatalyst for its outstanding light absorbance and photoinduced charge separation, but it suffers from severe photocorrosion, mainly due to the sluggish kinetics of holes transfer. In this work, we introduce the strong local Coulomb attraction, which is demonstrated via the in situ K-edge X-ray absorption near edge (XANES) analysis, to accelerate the migration of holes for long-term photocatalytic activity. As a proof-of-concept sample, the hole-attraction Fe2O3/CdS nanorods evidence an outstanding stability of at least 6 days without obvious deactivation, ...
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    Cadmiun sulfide (CdS) is considered as a promising semiconductor photocatalyst for its outstanding light absorbance and photoinduced charge separation, but it suffers from severe photocorrosion, mainly due to the sluggish kinetics of holes transfer. In this work, we introduce the strong local Coulomb attraction, which is demonstrated via the in situ K-edge X-ray absorption near edge (XANES) analysis, to accelerate the migration of holes for long-term photocatalytic activity. As a proof-of-concept sample, the hole-attraction Fe2O3/CdS nanorods evidence an outstanding stability of at least 6 days without obvious deactivation, and feature with an excellent H2 evolution rate of 20.7 mmol g−1 h−1. Moreover, this Coulomb attraction strategy can be leveraged to enhance the photocatalytic performance of Zn0.5Cd0.5S, indicating the wide application of the strategy.
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    Journal Title
    APPLIED CATALYSIS B-ENVIRONMENTAL
    Volume
    221
    DOI
    https://doi.org/10.1016/j.apcatb.2017.09.012
    Subject
    Physical chemistry
    Chemical engineering
    Environmental engineering
    Publication URI
    http://hdl.handle.net/10072/385262
    Collection
    • Journal articles

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