Non-Faradaic electrochemical modification of the catalytic activity of Pt using a CaZr0.9In0.1O3-α proton conductor
- 46 Downloads
In addition to proton conduction, CaZr0.9In0.1O3-α is known to exhibit oxygen and hole conduction. Proton conduction predominates over the temperature range, 380 to 460 °C, of the present investigation.
It was found that negative current application, i.e. proton supply to the Pt catalyst film causes up to 500% reversible enhancement to the rate of C2H4 oxidation. The catalytic rate increase is up to 20,000 higher than the rate, -I/F, of proton supply to the catalyst. The observed phenomena are discussed within the framework of previous electrochemical promotion (NEMCA) studies.
KeywordsOxidation Oxygen Analytical Chemistry Catalytic Activity C2H4
Unable to display preview. Download preview PDF.
- C.G. Vayenas, M.M. Jaksic, S. Bebelis and S.G. Neophytides, in “Modern Aspects of Electrochemistry” (J.O'M. Bockris, B.E. Conway and R.E. White, Eds.) Vol. 27, pp. 57–202, Plenum, New York, 1995.Google Scholar
- D. Tsiplakides, S.G. Neophytides, O. Enea, M.M. Jaksic and C.G. Vayenas, J. Electrochem. Soc., submitted (1996).Google Scholar
- N. Kurita, N. Fukatsu, K. Ito and T. Ohashi, J. Electrochem. Soc.142(5), 1552 (1995).Google Scholar
- C. Karavasilis, S. Bebelis and C.G. Vayenas, J. Catal.160, 205 (1996).Google Scholar