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Simple models for heterogeneous catalysis: Phase transition-like behavior in nonequilibrium systems
A simple model for heterogeneous catalysis, recently introduced by Ziff, Gulari, and Barshad (ZGB), has been explored using computer simulation. This is a nonequilibrium model which exhibits phase tra...
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Nitric oxide adsorption, decomposition, and desorption were studied on Rh(100) in the temperature range from 88 to 1100 K using electron energy loss spectroscopy (EELS) and temperature programmed deso...

Kinetic oscillations in the catalytic CO oxidation on Pt(100): Periodic perturbations

J. Chem. Phys. 87, 742 (1987); doi:10.1063/1.453572

Issue Date: 1 July 1987

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R. J. Schwankner, M. Eiswirth, P. Möller, and K. Wetzl
Institut für Physikalische Chemie, Universität München, 8 München 2, Federal Republic of Germany

G. Ertl
Fritz-Haber-Institut der Max Planck-Gesellschaft, 1 Berlin 33, Federal Republic of Germany
Periodic modulations of oxygen pressure or temperature were applied in the catalytic oxidation of CO on a Pt(100) surface under isothermal, low pressure conditions. Transitions from aperiodic autonomous oscillations to regular phase-locked behavior could be observed. Computer simulations using a stochastic cellular automaton model yielded qualitatively similar results. The spatial distribution in both experiment and simulation varies essentially in phase over the whole surface area under the influence of the periodic perturbation, while wave propagation in the autonomous system causes more irregular overall behavior. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 23 December 1986; accepted 17 March 1987
Permalink: http://link.aip.org/link/?JCPSA6/87/742/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.65.Jv
    Physical chemistry Surface processes Heterogeneous catalysis at surfaces and other surface reactions
  • 82.20.Mj
    Physical chemistry Chemical kinetics Nonequilibrium kinetics
  • YEAR: 1987

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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