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    High-Performance Perovskite Composite Electrocatalysts Enabled by Controllable Interface Engineering

    Access Status
    Fulltext not available
    Authors
    Xu, Xiaomin
    Pan, Y.
    Ge, L.
    Chen, Y.
    Mao, X.
    Guan, D.
    Li, M.
    Zhong, Yijun
    Hu, Z.
    Peterson, V.K.
    Saunders, M.
    Chen, C.T.
    Zhang, H.
    Ran, R.
    Du, A.
    Wang, H.
    Jiang, S.P.
    Zhou, W.
    Shao, Zongping
    Date
    2021
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Xu, X. and Pan, Y. and Ge, L. and Chen, Y. and Mao, X. and Guan, D. and Li, M. et al. 2021. High-Performance Perovskite Composite Electrocatalysts Enabled by Controllable Interface Engineering. Small. 17 (29): ARTN 2101573.
    Source Title
    Small
    DOI
    10.1002/smll.202101573
    ISSN
    1613-6810
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP200103332
    http://purl.org/au-research/grants/arc/DP200103315
    http://purl.org/au-research/grants/arc/LP160101729
    http://purl.org/au-research/grants/arc/LE0775553
    http://purl.org/au-research/grants/arc/LE0775551
    URI
    http://hdl.handle.net/20.500.11937/91965
    Collection
    • Curtin Research Publications
    Abstract

    Single-phase perovskite oxides that contain nonprecious metals have long been pursued as candidates for catalyzing the oxygen evolution reaction, but their catalytic activity cannot meet the requirements for practical electrochemical energy conversion technologies. Here a cation deficiency-promoted phase separation strategy to design perovskite-based composites with significantly enhanced water oxidation kinetics compared to single-phase counterparts is reported. These composites, self-assembled from perovskite precursors, comprise strongly interacting perovskite and related phases, whose structure, composition, and concentration can be accurately controlled by tailoring the stoichiometry of the precursors. The composite catalyst with optimized phase composition and concentration outperforms known perovskite oxide systems and state-of-the-art catalysts by 1–3 orders of magnitude. It is further demonstrated that the strong interfacial interaction of the composite catalysts plays a key role in promoting oxygen ionic transport to boost the lattice-oxygen participated water oxidation. These results suggest a simple and viable approach to developing high-performance, perovskite-based composite catalysts for electrochemical energy conversion.

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