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    Yolk–Shell-Structured Cu/Fe@γ-Fe2O3 Nanoparticles Loaded Graphitic Porous Carbon for the Oxygen Reduction Reaction

    Access Status
    Fulltext not available
    Authors
    Wang, M.
    Su, C.
    Saunders, M.
    Liang, J.
    Shao, Zongping
    Wang, S.
    Liu, Jian
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, M. and Su, C. and Saunders, M. and Liang, J. and Shao, Z. and Wang, S. and Liu, J. 2017. Yolk–Shell-Structured Cu/Fe@γ-Fe2O3 Nanoparticles Loaded Graphitic Porous Carbon for the Oxygen Reduction Reaction. Particle and Particle Systems Characterization. 34 (10): Article ID 1700158.
    Source Title
    Particle and Particle Systems Characterization
    DOI
    10.1002/ppsc.201700158
    ISSN
    0934-0866
    School
    Department of Chemical Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150103026
    URI
    http://hdl.handle.net/20.500.11937/56591
    Collection
    • Curtin Research Publications
    Abstract

    Core–shell Cu/γ-Fe2O3@C and yolk–shell-structured Cu/Fe@γ-Fe2O3@C particles are prepared by a facile synthesis method using copper oxide as template particles, resorcinol-formaldehyde as the carbon precursor, and iron nitrate solution as the iron source via pyrolysis. With increasing carbonization temperature and time, solid γ-Fe2O3 cores are formed and then transformed into Fe@γ-Fe2O3 yolk–shell-structured particles via Ostwald ripening under nitrogen gas flow. The composition variations are studied, and the formation mechanism is proposed for the generation of the hollow and yolk–shell-structured metal and metal oxides. Moreover, highly graphitic carbons can be obtained by etching the metal and metal oxide nanoparticles through an acid treatment. The electrocatalytic activity for oxygen reduction reaction is investigated on Cu/γ-Fe2O3@C, Cu/Fe@γ-Fe2O3@C, and graphitic carbons, indicating comparable or even superior performance to other Fe-based nanocatalysts.

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