Abstract
The oxidation of CO over thin films of a Pt-Rh alloy prepared by sequential vacuum evaporation of the metals on an inert support has been investigated at low pressures (P < 2''10-5 mbar). The results are compared with the data on the individual surfaces of Pt and Rh. It is found that the activity of the alloy is intermediate between the activities of the individual metals. The effect of alloy formation on the catalytic activity in CO oxidation is discussed.
Similar content being viewed by others
REFERENCES
S.H. Oh, J.E. Carpenter: J. Catal.,98,178 (1986).
Y. Cai, H.G. Stenger, Jr., C.E. Lyman: J. Catal.,161, 123 (1996).
J. Siera, F. Rutten, B.E. Nieuwenhuys: Catalysis Today, 10, 353 (1991).
R.M. Wolf, J. Siera, F.C.M.J.M. van Delf, B.E. Nieuwenhuys: Faraday Disc.-Chem. Soc., 87, 275 (1989).
A.V. Kalinkin, A.V. Pashis, V.I. Bukhtiyarov: React. Kinet. Catal. Lett., 77, 255 (2002).
F. Esch, S. GÜnter, E. SchÜtz, A. Schaak, I.G. Kevrekidis, M. Marsi, M. Kiskinova, R. Imbihl: Surf. Science,443, 245 (1999).
C.D. Wagner, L.E. Davis, M.W. Zeller: Surf. Interface Anal., 3, 211 (1981).
T. Engel, G. Ertl: Adv. Catal.,28,1 (1979).
S.B. Schwartz, L.D. Schmidt, G.B. Fisher: J. Phys. Chem.,90,6194 (1986).
C.R. Helms, H.P. Bonzel, S. Kelemen: J. Chem. Phys.,65,1773 (1976).
W.M. Daniel, Y. Kim, H.C. Peebles, J.M. White: Surf. Sci.,111,189 (1981).
B.E. Nieuwenhuys: The Chemical Physics of Solid Surfaces,6,185 (1993).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kalinkin, A., Pashis, A. & Bukhtiyarov, V. CO oxidation over the Pt-Rh system. 2. Reaction on an alloy. Reaction Kinetics and Catalysis Letters 78, 107–112 (2003). https://doi.org/10.1023/A:1022518017407
Issue Date:
DOI: https://doi.org/10.1023/A:1022518017407