ZGB surface reaction model with high diffusion rates

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.464174· OSTI ID:6924318

Evans, J W ^[1]

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1. Ames Laboratory and Department of Mathematics, Iowa State University, Ames, Iowa 50011 (United States)

The diffusionless ZGB (monomer--dimer) surface reaction model exhibits a discontinuous transition to a monomer-poisoned state when the fraction of monomer adsorption attempts exceeds 0.525. It has been claimed that this transition shifts to 2/3 with introduction of rapid diffusion of the monomer species, or of both species. We show this is not the case, 2/3 representing the spinodal rather than the transition point. For equal diffusion rates of both species, we find that the transition only shifts to 0.5951[plus minus]0.0002.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6924318
• Journal Information: Journal of Chemical Physics; (United States), Vol. 98:3; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ADSORPTION
SURFACES
CHEMICAL REACTION KINETICS
MATHEMATICAL MODELS
DIFFUSION
DIMERS
MONOMERS
KINETICS
REACTION KINETICS
SORPTION
400201* - Chemical & Physicochemical Properties