Electrochemical modification of the catalytic activity of TiO2/YSZ supported rhodium films
- 70 Downloads
The electrochemical activation of ethylene oxidation was studied over rhodium catalysts of different thickness (40, 100 and 160 nm) sputtered on top of a thin layer of TiO2 deposited on YSZ. The strong relationship between catalytic activity and oxidation state of rhodium was confirmed. Under open-circuit operation the catalyst potential appears as a suitable indicator of the surface oxidation state of rhodium allowing a prediction of the catalytic behavior from solid electrolyte potentiometric measurements. Under closed-circuit conditions the catalyst potential was used as a tool to tune the catalytic activity of rhodium which showed increasing promotional efficiency with decreasing catalyst film thickness.
Keywordselectrochemical promotion ethylene oxidation rhodium catalyst catalyst film thickness catalyst potential
Unable to display preview. Download preview PDF.
- 4.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
- 10.Fóti, G., Wodiunig, S., Comninellis, Ch. 2000Electrochemical promotion of catalysts for gas phase reactions, in: Current Topics in ElectrochemistryResearch TrendsTrivandrum1Google Scholar
- 13.Vayenas, C.G., Jaksic, M.M., Bebelis, S.I., Neophytides, S.G. 1996The electrochemical activation of catalytic reactionsBockris, O’M.Conway, B.E.White, R.E. eds. Modern Aspects of ElectrochemistryPlenum PressNew York57202Google Scholar
- 16.Riekert, L., Bunsenges, Ber. 1981Phys. Chem.85297Google Scholar
- 20.Vayenas, C.G., Pitselis, G. 2001I&EC Research404209Google Scholar