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FTIR STUDY OF THE OXYGEN REDUCTION REACTIONS ONSm0.5Sr0.5CoO3

Author

Listed:
  • QI-HUI WU

    (Semiconductor Photonics Research Center, Department of Physics, Xiamen University, Xiamen 361005, China)

  • HARRY ABERNATHY

    (Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA)

  • ZHE CHENG

    (Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA)

  • MEILIN LIU

    (Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA)

Abstract

The oxygen reduction on solid oxide fuel cell cathode electrode,Sm0.5Sr0.5CoO3, was studied by using emission Fourier transform infrared spectroscopy (FTIR). Superoxide$(O_{2}^{-})$species was detected with appearance of an IR peak at wavenumber about 1124 cm-1. Moreover, we interpreted for the first time that there would be a close relationship between the baseline shift of IR spectra and the oxygen vacancy concentration (OVC) of the samples. The downward baseline shift of IR spectra is due to the decrease of OVC in the bulk, while, the increase of the OVC in the bulk would cause the upward baseline shift.

Suggested Citation

  • Qi-Hui Wu & Harry Abernathy & Zhe Cheng & Meilin Liu, 2007. "FTIR STUDY OF THE OXYGEN REDUCTION REACTIONS ONSm0.5Sr0.5CoO3," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 14(04), pages 587-591.
    • Handle: RePEc:wsi:srlxxx:v:14:y:2007:i:04:n:s0218625x07009712
    DOI: 10.1142/S0218625X07009712
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