The effect of catalyst film thickness on the magnitude of the effect of electrochemical promotion 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 Faradaic efficiency Λ was found to increase moderately with increasing film thickness and to be described semiquantitatively by the ratio 2Fr o/I 0, where r o is the unpromoted rate and I 0 is the exchange current of the catalyst–electrolyte interface. The results are in good qualitative agreement with model predictions describing the diffusion and reaction of the backspillover O2- species, which causes electrochemical promotion.
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References
C.G. Vayenas S. Bebelis S Ladas (1990) Nature 343 625 Occurrence Handle1:CAS:528:DyaK3cXitVKmsr8%3D Occurrence Handle10.1038/343625a0
J. Pritchard (1990) Nature 343 592 Occurrence Handle10.1038/343592a0
R.M. Lambert F. Williams A. Palermo M.S Tikhov (2000) Topics Catal 13 91 Occurrence Handle1:CAS:528:DC%2BD3cXms1GisL8%3D Occurrence Handle10.1023/A:1009076720641
G. Foti S. Wodiunig C Comninellis (2001) Curr. Topics Electrochem. 7 1
C.A. Cavalca G.L. Haller (1998) J. Catal. 177 389 Occurrence Handle1:CAS:528:DyaK1cXltVKqtLY%3D Occurrence Handle10.1006/jcat.1998.2060
L. Ploense M. Salazar B. Gurau E.S. Smotkin (1997) JACS 119 11550 Occurrence Handle1:CAS:528:DyaK2sXnt1Cjs70%3D Occurrence Handle10.1021/ja9728841
P. Vernoux F. Gaillard L. Bultel E. Siebert M. Primet (2002) J. Catal. 208 412 Occurrence Handle1:CAS:528:DC%2BD38XktFGgsrc%3D Occurrence Handle10.1006/jcat.2002.3573
I. Metcalfe, J. Catal. 199 (2001) 247; J. Catal. 199 (2001) 259
S.L. Douvartzides P.E. Tsiakaras (2002) J. Catal. 211 521 Occurrence Handle1:CAS:528:DC%2BD38Xns12gtL8%3D
I.M. Petrushina V.A. Bandur F. Cappeln N.J. Bjerrum (2000) J. Electrochem. Soc. 147 IssueID8 3010 Occurrence Handle1:CAS:528:DC%2BD3cXmtVWht70%3D Occurrence Handle10.1149/1.1393640
C. Sanchez, 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)
G.Q. Lu A. Wieckowski (2000) Curr. Opin. Col. Interf. Sci. 5 95 Occurrence Handle1:CAS:528:DC%2BD3cXntVarsLs%3D Occurrence Handle10.1016/S1359-0294(00)00041-8
B. Grzybowska-Swierkosz J. Haber (1994) Annual Reports on the Progress of Chemistry The Royal Society of Chemistry Cambridge
J.O.M. Bockris Z.S. Minevski (1994) Electrochim. Acta 39 1471 Occurrence Handle1:CAS:528:DyaK2cXls1Gktr8%3D Occurrence Handle10.1016/0013-4686(94)85124-7
C.G. Vayenas, M.M. Jaksic, S. Bebelis, 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. 57
C.G. Vayenas, S. Bebelis, C. Pliangos, S. Brosda and D. Tsiplakides, Electrochemical Activation of Catalysis: Promotion, Electrochemical Promotion and Metal-Support Interactions (Kluwer Academic/Plenum Publishers, New York, 2001); references therein
A. Wieckowski E. Savinova C.G. Vayenas (Eds) (2003) Catalysis and Electrocatalysis at Nanoparticles Marcel Dekker Inc New York
J. Nicole D. Tsiplakides C. Pliangos X.E. Verykios C. Comninellis C.G. Vayenas (2001) J. Catal. 204 23 Occurrence Handle1:CAS:528:DC%2BD3MXotF2itbk%3D Occurrence Handle10.1006/jcat.2001.3360
C. Vayenas D. Archonta D. Tsiplakides (2003) J. Electroanal. Chem. 554–555 301 Occurrence Handle10.1016/S0022-0728(03)00240-7
C. Pliangos I.V. Yentekakis V.G. Papadakis C.G. Vayenas X.E. Verykios (1997) Appl. Catal. B 14 161 Occurrence Handle1:CAS:528:DyaK2sXns1eqt7g%3D Occurrence Handle10.1016/S0926-3373(97)00020-9
N. Kotsionopoulos S. Bebelis (2005) J. Appl. Electrochem. 35 1253 Occurrence Handle1:CAS:528:DC%2BD2MXhtlCrtbbI Occurrence Handle10.1007/s10800-005-9037-3
C.G. Vayenas S. Brosda C. J Pliangos (2001) Catal. 203 329 Occurrence Handle1:CAS:528:DC%2BD3MXotF2itL4%3D Occurrence Handle10.1006/jcat.2001.3348
S. Brosda C.G. Vayenas (2002) J. Catal. 208 38 Occurrence Handle1:CAS:528:DC%2BD38Xjs1SktL4%3D Occurrence Handle10.1006/jcat.2002.3549
S. Balomenou D. Tsiplakides A. Katsaounis S. Thiemann-Handler B. Cramer G. Foti Ch. Comninellis C.G. Vayenas (2004) Appl. Catal. B 52 181 Occurrence Handle1:CAS:528:DC%2BD2cXmt1Wrsbk%3D Occurrence Handle10.1016/j.apcatb.2004.04.007
E.A. Baranova A. Thursfield S. Brosda G. Fóti Ch. Comninellis C.G. Vayenas (2005) J. Electrochem. Soc. 152 IssueID2 E40 Occurrence Handle1:CAS:528:DC%2BD2MXhs1Krsr8%3D Occurrence Handle10.1149/1.1839511
C.G. Vayenas G. Pitselis (2001) I&EC Res. 40 IssueID20 4209 Occurrence Handle1:CAS:528:DC%2BD3MXjt1SgtL4%3D
C. Koutsodontis, A. Katsaounis, J. Figueroa, C. Cavalca and C.G. Vayenas, in preparation
C. Koutsodontis, A. Katsaounis, J. C. Figueroa, C. Cavalca, Carmo. J. Pereira and C.G. Vayenas, Topics Catal, in press (2006)
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Koutsodontis, C., Katsaounis, A., Figueroa, J.C. et al. The effect of catalyst film thickness on the magnitude of the electrochemical promotion of catalytic reactions. Top Catal 38, 157–167 (2006). https://doi.org/10.1007/s11244-006-0081-y
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DOI: https://doi.org/10.1007/s11244-006-0081-y