Evidence for a surface reaction between H and CO adsorbed on polycrystalline Pt
- 31 Downloads
Temperature programmed desorption (TPD) experiments have been performed after dosing an ion-sputtered and annealed polycrystalline Pt surface with CO and H2. The CO-dosing was done both sequentially and simultaneously. With increasing residence time on the surface, the H2-TPD spectra exhibit conversion of the original H2-like features to features similar to the CO-TPD peaks. This provides evidence for the formation of a CO/H surface species through a chemical reaction between adsorbed H and adsorbed CO. The reaction occurs more rapidly when the sample is dosed or held at elevated temperatures, indicating that the reaction is activated.
KeywordsPhysical Chemistry Catalysis Elevated Temperature Surface Reaction Temperature Program Desorption
Unable to display preview. Download preview PDF.
- 1.Z. Paál, P. G. Menon (editors): Hydrogen Effects in Catalysis: Fundamentals and Practical Applications. Marcel Dekker, New York 1988.Google Scholar
- 6.M. F. R. Mulcahy: Gas Kinetics. John Wiley and Sons, New York 1973.Google Scholar
- 11.C. H. Bartholomew in Hydrogen Effects in Catalysis: Fundamentals and Practical Applications (edited by Z. Paál and P.G. Menon). Marcel Dekker, New York 1988.Google Scholar
- 13.O. Melendez, G.B. Hoflund: unpublished data.Google Scholar
- 15.O. Melendez: Ph. D. Dissertation, University of Florida (1991).Google Scholar
- 18.K. Lenz, B. Poelsema, S. L. Bernasek G. Comsa:Surface Sci.,189/190, 431 (1987).Google Scholar
- 27.V. E. Kazarinov, G. Ya. Tysyachnaya:Elektrokhimiya,7, 1552 (1971).Google Scholar
- 28.M. W. Breiter: inModern Aspects of Electrochemistry (edited by J. O' M. Bockris and B. E. Conway), Vol. 10, p. 178. Plenum Press, Princeton, NJ, 1975.Google Scholar
- 29.M. W. Breiter: inElectrochemical Processes in Fuel Cells. Springer Verlag, Berlin 1969.Google Scholar