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    Effect of a reducing agent for silver on the electrochemical activity of an Ag/Ba0.5Sr0.5Co0.8Fe0.2O3-d electrode prepared by electroless deposition technique

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    Authors
    Zhou, W.
    Ran, R.
    Cai, R.
    Shao, Zongping
    Jin, W.
    Xu, N.
    Date
    2009
    Type
    Journal Article
    
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    Citation
    Zhou, W. and Ran, R. and Cai, R. and Shao, Z. and Jin, W. and Xu, N. 2009. Effect of a reducing agent for silver on the electrochemical activity of an Ag/Ba0.5Sr0.5Co0.8Fe0.2O3-d electrode prepared by electroless deposition technique. Journal of Power Sources. 186 (2): pp. 244-251.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2008.10.055
    ISSN
    0378-7753
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/39000
    Collection
    • Curtin Research Publications
    Abstract

    Silver-modified Ba0.5Sr0.5Co0.8Fe0.2O3-d (Ag/BSCF) electrodes were prepared using an electroless deposition technique. The morphology, microstructure and oxygen reduction reaction activity of the resulted Ag/BSCF electrodes were comparatively studied using Fourier transform infrared spectra, environmental scanning electron microscopy, temperature-programmed oxygen desorption, X-ray diffraction, and electrochemical impedance spectroscopy. An area-specific resistance as low as 0.038 O cm2 was achieved for N2H4-reduced Ag/BSCF cathode at 600 °C. Carbonates were detected over the BSCF surface during the reduction of silver, which deteriorated both the charge-transfer process and diffusion process of HCHO-reduced Ag/BSCF cathode for the oxygen electrochemical reduction reaction. An anode-supported single cell with an N2H4-reduced Ag/BSCF cathode showed a peak power of 826 mW cm-2 at 600 °C. In comparison, only 672 mW cm-2 was observed with the HCHO-reduced Ag/BSCF cathode. © 2008 Elsevier B.V. All rights reserved.

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