Bifurcation analysis of an oscillating surface reaction model

Krischer, Katharina; Eiswirth, Markus; Ertl, Gerhard

doi:10.1016/0039-6028(91)91121-D

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Bifurcation analysis of an oscillating surface reaction model

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Krischer, Katharina
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Eiswirth, Markus
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Ertl, Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Krischer, K., Eiswirth, M., & Ertl, G. (1991). Bifurcation analysis of an oscillating surface reaction model. Surface Science, 251-252, 900-904. doi:10.1016/0039-6028(91)91121-D.

Cite as: https://hdl.handle.net/21.11116/0000-000A-5B00-0

Abstract

In the CO oxidation on a Pt(110) surface under isothermal gradientless conditions at low pressures, kinetic oscillations occur which have been studied in detail experimentally. A simple 3-variable model, based on the classical Langmuir-Hinshelwood mechanism and the adsorbate-driven 1 × 1 → 1 × 2 phase transition of the Pt(110) surface, has been developed and analysed with the help of bifurcation theory. It explains the bistability and the occurrence of simple limit cycles. Extensions of the model in order to reproduce the more complex dynamics found in experiment are briefly discussed. With appropriate modifications the equations can model the dynamical behaviour of the Pt(100) and (111) surfaces, respectively.