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    A Universal Strategy to Design Superior Water-Splitting Electrocatalysts Based on Fast In Situ Reconstruction of Amorphous Nanofilm Precursors

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    Fulltext not available
    Authors
    Chen, G.
    Hu, Z.
    Zhu, Y.
    Gu, B.
    Zhong, Y.
    Lin, H.
    Chen, C.
    Zhou, W.
    Shao, Zongping
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, G. and Hu, Z. and Zhu, Y. and Gu, B. and Zhong, Y. and Lin, H. and Chen, C. et al. 2018. A Universal Strategy to Design Superior Water-Splitting Electrocatalysts Based on Fast In Situ Reconstruction of Amorphous Nanofilm Precursors. Advanced Materials. 30 (43).
    Source Title
    Advanced Materials
    DOI
    10.1002/adma.201804333
    ISSN
    0935-9648
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/71649
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The development of efficient bifunctional electrodes with extraordinary mass activity and robust stability is an eternal yet challenging goal for the water-splitting process. Surface reconstruction during electrocatalysis can form fresh-composition electrocatalysts with unusual amorphous phases in situ, which are more active but difficult to prepare by conventional methods. Here, a facile strategy based on fast reconstruction of amorphous nanofilm precursors is proposed for exploring precious-metal-free catalysts with good electronic conductivity, ultrahigh activity, and robust stability. As a proof of concept, an amorphous SrCo0.85Fe0.1P0.05O3-d (SCFP) nanofilm precursor with weak chemical bonds deposited onto a conductive nickel foam (NF) substrate (SCFP-NF) is synthesized by utilizing a high-energy argon plasma to break the strong chemical bonds in a crystalline SCFP target. The quickly reconstructed SCFP-NF bifunctional catalysts show ultrahigh mass activity of up to 1000 mA mg-1 at an overpotential of 550 mV and extremely long operational stability of up to 650 h at 10 mA cm-2, significantly overperforming state-of-the-art precious-metal catalysts. Such a strategy is further demonstrated to be a universal method, which can be applied to accelerate the reconstruction of other material systems to obtain various efficient electrocatalysts.

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