Russian Journal of Electrochemistry

, Volume 44, Issue 7, pp 852–856 | Cite as

Electrocatalysis of oxygen reduction by lanthanum-strontium manganate

  • C. A. C. Sequeira
  • D. M. F. Santos
  • P. S. D. Brito
Article

Abstract

The electrocatalysis of the oxygen reduction reaction by lanthanum-strontium manganate La0.5Sr0.5MnO3 (LSM) has been studied by cyclic voltammetry using the rotating ring-disc electrode technique (RRDE) in alkaline medium. From the ring-disc data and other kinetic parameters it was concluded that the oxygen reduction occurs by dissociative chemisorption at low overpotentials. At higher overpotentials, the formation of hydrogen peroxide (HO 2 in this case) on the electrocatalyst has been observed. The apparent exchange current density for oxygen reduction on LSM has been found to be 2 × 10−7 A cm−2, while the corresponding Tafel slope is 0.100 V per decade. The possible reaction mechanism for electroreduction of oxygen on this oxide catalyst has been discussed.

Key words

fuel cell metal-air battery lanthanum-strontium manganate oxygen reduction electrocatalysis 

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References

  1. 1.
    Jiang, S.P., Sol. State Ionics, 2002, vol. 146, p. 1.CrossRefGoogle Scholar
  2. 2.
    Pelosato, R., Sora, I.N., Dotelli, G., Ruffo, R., and Mari, C.M., J. Eur. Ceram. Soc., 2005, vol. 25, p. 2587.CrossRefGoogle Scholar
  3. 3.
    Petitjean, M., Caboche, G., Siebert, E., Dessemond, L., and Dufour, L.-C., J. Eur. Ceram. Soc., 2005, vol. 25, p. 2651.CrossRefGoogle Scholar
  4. 4.
    Kucernak, A. and Jiang, J., Chem. Eng. J., 2003, vol. 93, p. 81.CrossRefGoogle Scholar
  5. 5.
    Brito, P.S.D. and Sequeira, C.A.C., J. Power Sources, 1994, vol. 52, p. 1.CrossRefGoogle Scholar
  6. 6.
    Wang, B., J. Power Sources, 2005, vol. 152, p. 1.CrossRefGoogle Scholar
  7. 7.
    Adler, S.B., Sol. State Ionics, 1998, vol. 111, p. 125.CrossRefGoogle Scholar
  8. 8.
    Gasteiger, H.A., Kocha, S.S., Sompalli, B., and Wagner, F.T., Appl. Catal. B, 2005, vol. 56, p. 9.CrossRefGoogle Scholar
  9. 9.
    Lefevre, M., Dodelet, J.P., and Bertrand, P., J. Phys. Chem., Ser. B, 2002, vol. 106, p. 8705.CrossRefGoogle Scholar
  10. 10.
    Tseung, A.C.C. and Bevan, H.L., J. Electroanal. Chem., 1973, vol. 45, p. 429.CrossRefGoogle Scholar
  11. 11.
    Mao, L., Zhang, D., Sotomura, T., Nakatsu, K., Koshiba, N., and Ohsaka, T., Electrochim. Acta, 2003, vol. 48, p. 1015.CrossRefGoogle Scholar
  12. 12.
    Brito, P.S.D., Antunes, R.M.M., and Sequeira, C.A.C., Técnica, 1995, vol. 3/95, p. 43.Google Scholar
  13. 13.
    Matsumoto, Y. and Sato, E., Electrochim. Acta, 1980, vol. 25, p. 585.CrossRefGoogle Scholar
  14. 14.
    Gojkovic, S.Lj., Zecevic, S.K., and Savinell, R.F., J. Electrochem. Soc., 1998, vol. 145, p. 3713.CrossRefGoogle Scholar
  15. 15.
    Damjanovic, A., Genshaw, M.A., and Bockris, J.O’M., J. Chem. Phys., 1966, vol. 45, p. 4057.CrossRefGoogle Scholar
  16. 16.
    Yeung, K.L.M. and Tseung, A.C.C., J. Electrochem. Soc., 1978, vol. 125, p. 878.CrossRefGoogle Scholar
  17. 17.
    Hayashi, M., Hyodo, T., Miura, N., and Yamazoe, N., Electrochemistry, 2000, vol. 68, p. 112.Google Scholar
  18. 18.
    Raj, I. Arul, Sol. State Ionics, 1994, vol. 68, p. 5.CrossRefGoogle Scholar
  19. 19.
    Zhong, G.Q., Xiong, H., and Jia Y.Q., Mat. Chem. Phys., 2005, vol. 91, p. 10.CrossRefGoogle Scholar
  20. 20.
    Chen, X.J., Khor, K.A., and Chan, S.H., Sol. State Ionics, 2004, vol. 167, p. 379.CrossRefGoogle Scholar
  21. 21.
    Yeager, E.B. (Proc. Electrochem. Soc. Symp.), 1977, vol. 77, no. 6, p. 149.Google Scholar
  22. 22.
    Bevan, H.L. and Tseung, A.C.C., Electrochim. Acta, 1974, vol. 19, p. 201.CrossRefGoogle Scholar

Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • C. A. C. Sequeira
    • 1
  • D. M. F. Santos
    • 1
  • P. S. D. Brito
    • 2
  1. 1.Department of Chemical and Biological Engineering, Instituto Superior TecnicoTechnical University of Lisbon (TULisbon)LisboaPortugal
  2. 2.Escola Superior de Tecnologia e Gestao de PortalegrePortalegrePortugal

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