Class of Cellular Automata for the Formation of Surface Aggregates

Jean Pierre Boon (), Christopher Bodenstein and David Hanon
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Jean Pierre Boon: Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, Campus Plaine, C.P. 231 1050 Brussels, Belgium
Christopher Bodenstein: Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, Campus Plaine, C.P. 231 1050 Brussels, Belgium
David Hanon: Center for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, Campus Plaine, C.P. 231 1050 Brussels, Belgium

International Journal of Modern Physics C (IJMPC), 1998, vol. 09, issue 08, 1559-1566

Abstract: A class of cellular automata is constructed on the basis of a set of simple rules: virtual particles obeying a full exclusion principle are subject to probabilistic dynamics with nonlocal (attractive and repulsive) interactions, and with momentum transfer memory effects. Boundary conditions can be periodic or can be set to simulate open systems, with various geometries. This model system possesses the essential elements to simulate the formation of surface aggregates. A specific application is presented for the formation and the dynamics ofislandsof hydroxyl groups in the catalytic reduction of NO on a Pt surface. The comparison between the simulation results and the experimental observations by Field Ion Microscopy suggests possible mechanisms for the so-far unexplained formation and dynamics of hydroxylislandsduring the NO reduction processes.

Keywords: Surface Aggregates; Cellular Automata; IslandsFormation; Heterogeneous Catalysis (search for similar items in EconPapers)
Date: 1998
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DOI: 10.1142/S0129183198001400

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