Campus Units

Physics and Astronomy, Mathematics, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

1993

Journal or Book Title

Physical Review E

Volume

48

Issue

5

First Page

3577

Last Page

3588

DOI

10.1103/PhysRevE.48.3577

Abstract

The three-component irreversible surface-reaction model A+BCAC+1/2B2 with infinite reaction rates between nearest-neighbor adspecies is studied by Monte Carlo simulations. For a square lattice the system evolves to a degenerate poisoned state exponentially in time, except for a narrow range of pressures in which a reactive quasi-steady-state exists. The latter poisons very slowly in time. For a hexagonal lattice a true reactive steady state occurs for a range of pressures bordered by continuous and discontinuous transitions to poisoned states. The latter behavior is observed by adding the reaction channel A+BAB on a square lattice. Some properties of these models are elucidated by analysis of appropriate exact master equations and corresponding pair approximations. Other issues addressed include ‘‘extent of variability’’ of the degenerate poisoned states, the effect of finite reaction rates, and spatial correlations.

Comments

This article is published as Meng, B., W. H. Weinberg, and J. W. Evans. "Transitions in the kinetics and steady states of irreversible A+BC surface-reaction models." Physical Review E 48, no. 5 (1993): 3577, doi:

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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