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    Enhancing Electrocatalytic Activity of Perovskite Oxides by Tuning Cation Deficiency for Oxygen Reduction and Evolution Reactions

    Access Status
    Fulltext not available
    Authors
    Zhu, Y.
    Zhou, W.
    Yu, J.
    Chen, Y.
    Liu, M.
    Shao, Zongping
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhu, Y. and Zhou, W. and Yu, J. and Chen, Y. and Liu, M. and Shao, Z. 2016. Enhancing Electrocatalytic Activity of Perovskite Oxides by Tuning Cation Deficiency for Oxygen Reduction and Evolution Reactions. cmChemistry of Materials. 28 (6): pp. 1691-1697.
    Source Title
    cm Chemistry of Materials
    DOI
    10.1021/acs.chemmater.5b04457
    ISSN
    0897-4756
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/35470
    Collection
    • Curtin Research Publications
    Abstract

    Development of cost-effective and efficient electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of prime importance to emerging renewable energy technologies. Here, we report a simple and effective strategy for enhancing ORR and OER electrocatalytic activity in alkaline solution by introducing A-site cation deficiency in LaFeO3 perovskite; the enhancement effect is more pronounced for the OER than the ORR. Among the A-site cation deficient perovskites studied, La0.95FeO3-δ (L0.95F) demonstrates the highest ORR and OER activity and, hence, the best bifunctionality. The dramatic enhancement is attributed to the creation of surface oxygen vacancies and a small amount of Fe4+ species. This work highlights the importance of tuning cation deficiency in perovskites as an effective strategy for enhancing ORR and OER activity for applications in various oxygen-based energy storage and conversion processes.

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