Topics in Catalysis

, Volume 44, Issue 3, pp 391–398 | Cite as

Investigations under real operating conditions of the electrochemical promotion by O2 temperature programmed desorption measurements

Article

The origin of the electrochemical promotion of catalysis (EPOC) was investigated via oxygen temperature-programmed desorption (O2-TPD) from a polycrystalline Pt film interfaced with YSZ. TPD experiments were carried out under operating conditions similar to those used for catalytic activity measurements. This study has clearly shown that an anodic current generates the migration of “backspillover” ionic oxygen species from YSZ toward the Pt surface. These ionic species act as promoters and enable the formation of weakly adsorbed oxygen species coming from the gas phase which are more reactive and thus responsible for the activity enhancement. The effect of polarization is to carry or to remove the promoting ionic species on the Pt surface. Therefore, electrochemical promotion of catalysis can be considered as an electrically controlled metal support interaction, where the support is an O2− conducting solid electrolyte.

Keywords

Pt YSZ propane combustion NEMCA electrochemical promotion 

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References

  1. 1.
    Vayenas, C.G., Bebelis, S., Neophytides, S. 1988J. Phys. Chem.925083CrossRefGoogle Scholar
  2. 2.
    Vayenas, C.G., Bebelis, S., Ladas, S. 1990Nature (London)343625CrossRefGoogle Scholar
  3. 3.
    Vayenas, C.G., Bebelis, S., Yentekakis, I.V., Lintz, H.G. 1992Catal. Today11303CrossRefGoogle Scholar
  4. 4.
    C.G. Vayenas, M.M. Jaksic, S. Bebelis and S.G. Neophitides, in: Modern Aspects of Electrochemistry, Vol. 29, eds. J.O.M. Bockris, B.E. Conway and R.E. White (Plenum, New York, 1996) p. 57Google Scholar
  5. 5.
    C.G. Vayenas, S. Bebelis, C. Pliangos, S. Brosda and D. Tsiplakides, Electrochemical Activation of Catalysis: Promotion, Electrochemical Promotion Metal–Support Interactions (Kluwer Academic/Plenum, New York, 2001)Google Scholar
  6. 6.
    Tsiakaras, P., Vayenas, C.G. 1993J. Catal.14053CrossRefGoogle Scholar
  7. 7.
    Gaillard, F., Li, X., Uray, M., Vernoux, P. 2004Catal. Lett.96177CrossRefGoogle Scholar
  8. 8.
    Kaloyannis, A., Vayenas, C.G. 1997J. Catal.171148CrossRefGoogle Scholar
  9. 9.
    Kaloyannis, A., Vayenas, C.G. 1999J. Catal.18237CrossRefGoogle Scholar
  10. 10.
    Vayenas, C.G., Bebelis, S., Despotopoulou, M. 1991J. Catal.128415CrossRefGoogle Scholar
  11. 11.
    Yentekakis, I.V., Palermo, A., Filkin, N.C., Tikhov, M.S., Lambert, R.M. 1997J. Phys. Chem. B1013759CrossRefGoogle Scholar
  12. 12.
    Petrolekas, P.D., Brosda, S., Vayenas, C.G. 1998J. Electrochem. Soc.1451469CrossRefGoogle Scholar
  13. 13.
    Makri, M., Buekenhoudt, A., Luyten, J., Vayenas, C.G. 1996Ionics282Google Scholar
  14. 14.
    Balomenou, S., Pitselis, G., Polydoros, D., Giannikos, A., Vradis, A., Frenzel, A., Pliangos, C., Pütter, H., Vayenas, C.G. 2000Solid State Ionics136–137857CrossRefGoogle Scholar
  15. 15.
    Tsiplakides, D., Neophitides, S., Enea, O., Jaksic, M.M., Vayenas, C.G. 1997J. Electrochem. Soc.1442072CrossRefGoogle Scholar
  16. 16.
    Yentekakis, I.V., Vayenas, C.G. 1994J. Catal.149238CrossRefGoogle Scholar
  17. 17.
    Pliangos, C., Yentekakis, I.V., Ladas, S., Vayenas, C.G. 1996J. Catal.159189CrossRefGoogle Scholar
  18. 18.
    Petrolekas, P.D., Balomenou, S., Vayenas, C.G. 1998J. Electrochem. Soc.1451202CrossRefGoogle Scholar
  19. 19.
    Ladas, S., Kennou, S., Bebelis, S., Vayenas, C.G. 1993J. Phys. Chem.978845CrossRefGoogle Scholar
  20. 20.
    Jiang, Y., Yentekakis, I.V., Vayenas, C.G. 1994J. Catal.148240CrossRefGoogle Scholar
  21. 21.
    Kaloyannis, A., Vayenas, C.G. 1999J. Catal.18237CrossRefGoogle Scholar
  22. 22.
    Makri, M., Vayenas, C.G., Bebelis, S., Besocke, K.H., Cavalca, C. 1996Surf. Sci.369351CrossRefGoogle Scholar
  23. 23.
    Frantzis, A.D., Bebelis, S., Vayenas, C.G. 2000Solid State Ionics136–137863CrossRefGoogle Scholar
  24. 24.
    Nicole, J., Tsiplakides, D., Wodiunig, S., Comminellis, C. 1997J. Electrochem. Soc1441312CrossRefGoogle Scholar
  25. 25.
    Tsiplakides, D., Vayenas, C.G. 2001J. Electrochem. Soc.148E189CrossRefGoogle Scholar
  26. 26.
    Vayenas, C.G., Brosda, S., Pliangos, C. 2001J. Catal.203329CrossRefGoogle Scholar
  27. 27.
    Brosda, S., Vayenas, C.G. 2002J. Catal.2083853CrossRefGoogle Scholar
  28. 28.
    Basini, L., Cavalca, C.A., Haller, G.L. 1994J. Phys. Chem.8810853CrossRefGoogle Scholar
  29. 29.
    Kondarides, D.I., Papatheodorou, G.N., Vayenas, C.G., Verykios, X.E. 1993Ber. Bunsenges Phys. Chem.97709Google Scholar
  30. 30.
    Neophytides, S.G., Tsiplakides, D., Vayenas, C.G. 1998J. Catal178414CrossRefGoogle Scholar
  31. 31.
    Vayenas, C.G., Archonta, D., Tsiplakides, D. 2003J. Electroanal. Chem.554–555301CrossRefGoogle Scholar
  32. 32.
    Katsaounis, A., Nikopoulou, Z., Verykios, X.E., Vayenas, C.G. 2004J. Catal.222192CrossRefGoogle Scholar
  33. 33.
    Neophytides, S.G., Vayenas, C.G. 1995J. Phys. Chem.9917063CrossRefGoogle Scholar
  34. 34.
    A. Billard, P. Vernoux, Topics Catal. (2006) in pressGoogle Scholar
  35. 35.
    Garetto, T.F., Rincón, E., Apesteguia, C.R. 2004Appl. Catal. B48167CrossRefGoogle Scholar
  36. 36.
    Vernoux, P., Gaillard, F., Bultel, L., Siebert, E., Primet, M. 2002J. Catal.208412CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Laboratoire d’Application de la Chimie à l’Environnement (LACE), UMR 5634 CNRSVilleurbanne CedexFrance

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