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    Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity

    Access Status
    Fulltext not available
    Embargo Lift Date
    2023-08-27
    Authors
    Javaid, Shaghraf
    Xu, Xiaomin
    Chen, Wei
    Chen, Jiayi
    Hsu, H.Y.
    Wang, S.
    Yang, X.
    Li, Y.
    Shao, Zongping
    Jones, Franca
    Jia, Guohua
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Javaid, S. and Xu, X. and Chen, W. and Chen, J. and Hsu, H.Y. and Wang, S. and Yang, X. et al. 2021. Ni2+/Co2+ doped Au-Fe7S8 nanoplatelets with exceptionally high oxygen evolution reaction activity. Nano Energy. 89: Article No. 106463.
    Source Title
    Nano Energy
    DOI
    10.1016/j.nanoen.2021.106463
    ISSN
    2211-2855
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    School of Molecular and Life Sciences (MLS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT210100509
    http://purl.org/au-research/grants/arc/LE120100026
    URI
    http://hdl.handle.net/20.500.11937/87966
    Collection
    • Curtin Research Publications
    Abstract

    To overcome the limited potency of energy devices such as alkaline water electrolyzers, the construction of active materials with dramatically enhanced oxygen evolution reaction (OER) performance is of great importance. Herein we developed an ion diffusion-induced doping strategy that is capable of producing Ni2+/Co2+ doped two-dimensional (2D) Au-Fe7S8 nanoplatelets (NPLs) with exceptionally high OER activity outperforming the benchmark RuO2 catalyst. The co-existence of Co and Ni in Au-Fe7S8 NPLs led to the lowest OER overpotential of 243 mV at 10 mA cm-2 and fast kinetics with a Tafel slope of 43 mV dec-1. Density functional theory (DFT) calculations demonstrated that Ni2+/Co2+ doping improves the binding of OOH species on the {001} surfaces of Au-Fe7S8 NPLs and lowers the Gibbs free energy of the OER process, which are beneficial to outstanding OER activity of the nanoplatelets.

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