Topics in Catalysis

, Volume 44, Issue 3, pp 419–425 | Cite as

Impedance spectroscopic investigation of a Rh/YSZ catalyst under polarization

  • E. A. Baranova
  • G. Fóti
  • H. Jotterand
  • Ch. Comninellis

Electrochemical impedance spectra at 450–600 °C and \({P_{{\rm{O}}_{\rm{2}} } = 0.5}\) kPa of a rhodium catalyst interfaced with yttria-stabilized-zirconia (Rh/YSZ) were compared with a model based on the mechanism of electrochemical promotion. In the proposed equivalent electric circuit, existence of an “effective” double layer at the gas-exposed catalyst surface and its potential-controlled modification via diffusion of oxygen ions between the O2− conducting solid electrolyte support (YSZ) and the catalyst are represented by two additional elements: adsorption capacitance and Warburg impedance. Under positive polarization, the adsorption capacitance increases dramatically indicating reinforcement of the “effective” double layer at the catalyst/gas interface, in agreement with the observation known from electrochemical promotion practice that positive polarization of a rhodium electrode leads to rhodium oxide reduction, hence, to dramatic increase in catalytic reaction rate.


rhodium electrode electrochemical promotion rhodium oxide reduction impedance spectroscopy 


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  1. 1.
    Oh, S.H., Carpenter, J.E. 1983J. Catal.80472CrossRefGoogle Scholar
  2. 2.
    Kellog, G.L. 1986Surface Sci.171359CrossRefGoogle Scholar
  3. 3.
    Pliangos, C., Yentekakis, I.V., Verykios, X.E., Vayenas, C.G. 1995J. Catal.154124CrossRefGoogle Scholar
  4. 4.
    Pliangos, C., Yentekakis, I.V., Ladas, S., Vayenas, C.G. 1996J. Catal.159189CrossRefGoogle Scholar
  5. 5.
    Baranova, E.A., Thursfield, A., Brosda, S., Fóti, G., Comninellis, Ch., Vayenas, C.G. 2005J. Electrochem. Soc.152E40CrossRefGoogle Scholar
  6. 6.
    Baranova, E.A., Thursfield, A., Brosda, S., Fóti, G., Comninellis, Ch., Vayenas, C.G. 2005Catal. Lett.10515CrossRefGoogle Scholar
  7. 7.
    Fóti, G., Bolzonella, I., Bachelin, D., Comninellis, Ch. 2004J. Appl. Electrochem.349CrossRefGoogle Scholar
  8. 8.
    Fóti, G., Lavanchy, O., Comninellis, Ch. 2000J. Appl. Electrochem.301223CrossRefGoogle Scholar
  9. 9.
    Pliangos, C., Raptis, C., Badas, T., Vayenas, C.G. 2000Solid State Ionics136–137767CrossRefGoogle Scholar
  10. 10.
    Pliangos, C., Raptis, C., Badas, T., Vayenas, C.G. 2000Ionics6119CrossRefGoogle Scholar
  11. 11.
    Vayenas, C.G., Bebelis, S., Neophytides, S.G. 1988J. Phys. Chem.925083CrossRefGoogle Scholar
  12. 12.
    Vayenas, C.G., Bebelis, S., Pliangos, C., Brosda, S., Tsiplakides, D. 2001Electrochemical Activation of Catalysis. Promotion, Electrochemical Promotion, and Metal-support InteractionKluwer Academic/Plenum PublishersNew YorkGoogle Scholar
  13. 13.
    Nicole, J., Tsiplakides, D., Pliangos, C., Verykios, X.E., Comninellis, Ch., Vayenas, C.G. 2001J. Catal.20423CrossRefGoogle Scholar
  14. 14.
    G. Fóti, S. Wodiunig and Ch. Comninellis, in: Current Topics in Electrochemistry, Vol. 7 (Research Trends, Trivandrum, 2000) p. 1Google Scholar
  15. 15.
    Baranova, E.A., Fóti, G., Comninellis, Ch. 2004Electrochem. Comm.6170CrossRefGoogle Scholar
  16. 16.
    Pettit, F.S., Yinger, F.S., Wagner, J.B. 1960Acta Metal.8617CrossRefGoogle Scholar
  17. 17.
    Pettit, F.S., Wagner, J.B. 1964Acta Metal.1235CrossRefGoogle Scholar
  18. 18.
    E.A. Baranova Chemical and electrochemical promotion of supported rhodium catalyst, Thesis 3245, EPFL, Lausanne (2005)Google Scholar
  19. 19.
    Povorov, Y.M., Vorob’eva, I.V. 1982Elektrokhimiya181693Google Scholar
  20. 20.
    Povorov, Y.M., Beketaeva, L.A., Vorob’eva, I.V. 1983Elektrokhimiya19586Google Scholar
  21. 21.
    Kanevskiy, L.S., Avdolyan, M.B., Kulova, T.L. 1995Elektrokhimiya31383Google Scholar
  22. 22.
    Kuznetsov, A.A., Netesa, V.V. 1999Ukr. Chim. J.65126Google Scholar
  23. 23.
    Chebotin, V.N., Perfilev, M.V. 1978Electrochemistry of Solid ElectrolytesKhimiia Publ. HouseMoscouGoogle Scholar
  24. 24.
    Deportes, C., Duclot, M., Fabry, P., Fouletier, J., Hammou, A., Kleitz, M., Siebert, E., Souquet, J.-L. 1994Electrochimie des solidesGrenoble University PressGrenobleGoogle Scholar
  25. 25.
    Frantzis, A.D., Bebelis, S., Vayenas, C.G. 2000Solid State Ionics136–137863CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • E. A. Baranova
    • 1
  • G. Fóti
    • 1
  • H. Jotterand
    • 2
  • Ch. Comninellis
    • 1
  1. 1.Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de LausanneLausanneSwitzerland
  2. 2.Institute of Physics of the Complex Matter, Ecole Polytechnique Fédérale de LausanneLausanneSwitzerland

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