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    Performance and stability of La0.8Sr0.2MnO3 cathode promoted with palladium based catalysts in solid oxide fuel cells

    Access Status
    Fulltext not available
    Authors
    Babaei, A.
    Zhang, L.
    Liu, E.
    Jiang, San Ping
    Date
    2011
    Type
    Journal Article
    
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    Citation
    Babaei, A. and Zhang, L. and Liu, E. and Jiang, S.P. 2011. Performance and stability of La0.8Sr0.2MnO3 cathode promoted with palladium based catalysts in solid oxide fuel cells. Journal of Alloys and Compounds. 509 (14): pp. 4781-4787.
    Source Title
    Journal of Alloys and Compounds
    ISSN
    0925-8388
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/36983
    Collection
    • Curtin Research Publications
    Abstract

    The effect of catalyst loading, operation temperature and co-infiltration of the palladium-based catalystson the performance and stability of La0.8Sr0.2MnO3 (LSM) cathode of solid oxide fuel cells (SOFCs) isinvestigated. The result shows that adding a small amount of Pd catalyst (0.08mgcm-2) has a remarkable effect on the reduction of overpotential of LSM cathodes and high palladium loading is detrimental to the electrochemical activity of LSM cathodes. The performance and stability of the Pd-impregnated LSM cathodes can be enhanced significantly by co-infiltration of palladium with either 20 mol% of silver or 5 mol% of cobalt. Increased stability of the co-infiltrated catalyst materials is probably related to the enhanced resistance of the co-impregnated Pd0.95Co0.05 and Pd0.8Ag0.2 nanoparticles against agglomeration and sintering at SOFC operation temperatures. The results indicate the co-impregnation is effective not only to enhance the electrochemical activity but also to improve the stability of LSM cathodes for the O2 reduction reaction of SOFCs.

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