Topics in Catalysis

, Volume 39, Issue 1–2, pp 97–100 | Cite as

The effect of catalyst film thickness on the electrochemical promotion of ethylene oxidation on Pt

  • C. Koutsodontis
  • A. Katsaounis
  • J. C. Figueroa
  • C. Cavalca
  • C. Pereira
  • C. G. Vayenas

The effect of catalyst film thickness on the magnitude of the effect of electrochemical promotion of catalysis (EPOC or NEMCA effect) was investigated for the model catalytic reaction of C2H4 oxidation on porous Pt paste catalyst-electrodes deposited on YSZ. It was found that the catalytic rate enhancement ρ is up to 400 for thinner (0.2 μm) Pt films (40,000% rate enhancement) and gradually decreases to 50 for thicker (1 μm) films. The results are in good qualitative agreement with model predictions describing the diffusion and reaction of the backspillover O2− species which causes electrochemical promotion.


electrochemical promotion NEMCA effect porous film thickness effect ethylene oxidation promotional rules 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Vayenas, C.G., Bebelis, S., Ladas, S. 1990Nature343625CrossRefGoogle Scholar
  2. [2]
    Pritchard, J. 1990Nature343592CrossRefGoogle Scholar
  3. [3]
    Lambert, R.M., Williams, F., Palermo, A., Tikhov, M.S. 2000Top Catal1391CrossRefGoogle Scholar
  4. [4]
    Foti, G., Wodiunig, S., Comninellis, C. 2001Curr. Top. Electrochem.71Google Scholar
  5. [5]
    Cavalca, C.A., Haller, G.L. 1998J. Catal.177389CrossRefGoogle Scholar
  6. [6]
    Ploense, L., Salazar, M., Gurau, B., Smotkin, E.S. 1997JACS11911550CrossRefGoogle Scholar
  7. [7]
    Vernoux, P., Gaillard, F., Bultel, L., Siebert, E., Primet, M. 2002J. Catal.208412CrossRefGoogle Scholar
  8. [8]
    I. Metcalfe, J. Catal. 199 (2001) 247; J. Catal. 199 (2001) 259Google Scholar
  9. [9]
    Douvartzides, S.L., Tsiakaras, P.E. 2002J. Catal.211521Google Scholar
  10. [10]
    Petrushina, I.M., Bandur, V.A., Cappeln, F., Bjerrum, N.J. 2000J. Electrochem. Soc.1473010CrossRefGoogle Scholar
  11. [11]
    C. Sanchez and E. Leiva, in: Handbook of Fuel Cells: Fundamentals, Technology and Applications, Vol. 2, eds. W. Vielstich, H. Gasteiger and A. Lamm (John Wiley & Sons Ltd., England, 2003)Google Scholar
  12. [12]
    Lu, G.-Q., Wieckowski, A. 2000Curr. Opin. Colloid. Interf. Sci.595CrossRefGoogle Scholar
  13. [13]
    Grzybowska-Swierkosz, B., Haber, J. 1994Annual Reports on the Progress of ChemistryThe Royal Society of ChemistryCambridgeGoogle Scholar
  14. [14]
    Bockris, J.O.M., Minevski, Z.S. 1994Electrochim. Acta391471CrossRefGoogle Scholar
  15. [15]
    C.G. Vayenas, M.M. Jaksic, S. Bebelis and S.G. Neophytides, in: Modern Aspects of Electrochemistry, Vol. 29, eds. J.O.M. Bockris, B.E. Conway and R.E. White (Kluwer Academic/Plenum Publishers, New York, 1996) p. 57Google Scholar
  16. [16]
    Vayenas, C.G., Bebelis, S., Pliangos, C., Brosda, S., Tsiplakides, D. 2001Electrochemical Activation of Catalysis: Promotion, Electrochemical Promotion and Metal–Support InteractionsKluwer Academic/Plenum PublishersNew York references thereinGoogle Scholar
  17. [17]
    Wieckowski, A.Savinova, E.Vayenas, C.G. eds. 2003Catalysis and Electrocatalysis at NanoparticlesMarcel Dekker, IncNew YorkGoogle Scholar
  18. [18]
    J. Nicole et al., J. Catal. 204 (2001) 23Google Scholar
  19. [19]
    Vayenas, C., Archonta, D., Tsiplakides, D. 2003J. Electroanal. Chem.554–555301CrossRefGoogle Scholar
  20. [20]
    Pliangos, C., Yentekakis, I.V., Papadakis, V.G., Vayenas, C.G., Verykios, X.E. 1997Appl. Catal. B14161CrossRefGoogle Scholar
  21. [21]
    N. Kotsionopoulos and S. Bebelis, Proc. of the 55th Annual Meeting of the ISE (Thessaloniki Greece, 2004) p. 1373; J. Appl. Electrochem., submitted (2004)Google Scholar
  22. [22]
    Vayenas, C.G., Brosda, S., Pliangos, C. 2001J. Catal.203329CrossRefGoogle Scholar
  23. [23]
    Brosda, S., Vayenas, C.G. 2002J. Catal.20838CrossRefGoogle Scholar
  24. [24]
    Balomenou, S., Tsiplakides, D., Katsaounis, A., Thiemann-Handler, S., Cramer, B., Foti, G., Comninellis , Ch., Vayenas, C.G. 2004Appl. Catal. B52181CrossRefGoogle Scholar
  25. [25]
    Baranova, E.A., Thursfield, A., Brosda, S., Fóti, G., Comninellis, Ch., Vayenas, C.G. 2005J. Electrochem. Soc.152E40CrossRefGoogle Scholar
  26. [26]
    Vayenas, C.G., Pitselis, G. 2001I&EC Res.404209Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • C. Koutsodontis
    • 1
  • A. Katsaounis
    • 1
  • J. C. Figueroa
    • 2
  • C. Cavalca
    • 2
  • C. Pereira
    • 2
  • C. G. Vayenas
    • 1
  1. 1.LCEP, Department of Chemical EngineeringUniversity of PatrasPatrasGreece
  2. 2.DuPont Company, Central Research & Development, MS&E, Experimental StationWilmingtonUSA

Personalised recommendations