Abstract
Statistical lattice models which imitate oscillatory and wave dynamics in the adsorbed layer during of carbon monoxide oxidation over Pt(100) and Pd(110) single crystals differing in the mechanism of autooscillation formation are compared. In the case of platinum, oscillations are due to phase transitions of the catalyst surface structure and surface reconstruction under the action of the reaction medium. In the case of palladium, the driving force of oscillations is phase transitions in the adsorbed layers on the catalyst surface, namely, the reversible formation of subsurface oxygen in the course of the reaction, which modifies the adsorption and catalytic properties of the surface. It is shown that, according to the proposed models, a change in the coverages (COads ↔ Oads) in the autooscillation regimes occurs via the formation of a surface wave whose front is characterized by the high concentration of catalytically active sites that provide the maximal rate of CO2 molecule formation. Under certain conditions, the formation of various spatiotemporal structures is observed in simulation experiments.
Similar content being viewed by others
REFERENCES
Ertl, G., Adv. Catal., 1990, vol. 37, p. 213.
Gelten, R.J., Jansen, A.P.J., van Santen, R.A., Lukkien, J.J., Segners, J.P.L., and Hilbers, P.A.J., J. Chem. Phys., 1998, vol. 108, no.14, p. 5921.
Zhdanov, V.P., Surf. Sci. Rep., 2002, vol. 45, nos.7-8, p. 233.
Latkin, E.I., Elokhin, V.I., and Gorodetskii, V.V., J. Mol. Catal. A: Chem., 2001, vol. 166, p. 23.
Latkin, E.I., Elokhin, V.I., Matveev, A.V., and Gorodetskii, V.V., J. Mol. Catal. A: Chem., 2000, vol. 158, p. 161.
Gorodetskii, V.V., Matveev, A.V., Kalinkin, A.V., and Niewenhuys, B.E., Chemistry for Sustainable Development, 2003, vol. 11, p. 67.
Gorodetskii, V.V. and Drachsel, W., Appl. Catal., A, 1999, vol. 188, p. 267.
Lauterbach, J., Bonilla, G., and Pletcher, T.D., Chem. Eng. Sci., 1999, vol. 54, p. 4501.
Latkin, E.I., Elokhin, V.I., and Gorodetskii, V.V., Chem. Eng. J., 2003, vol. 91, p. 123.
Block, J.H., Ehsasi, M., Gorodetskii, V., Karpowicz, A., and Berdau, M., Stud. Surf. Sci. Catal., 1993, vol. 77, p. 189.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Elokhin, V.I., Latkin, E.I., Matveev, A.V. et al. Application of Statistical Lattice Models to the Analysis of Oscillatory and Autowave Processes in the Reaction of Carbon Monoxide Oxidation over Platinum and Palladium Surfaces. Kinetics and Catalysis 44, 692–700 (2003). https://doi.org/10.1023/A:1026106509151
Issue Date:
DOI: https://doi.org/10.1023/A:1026106509151