Abstract
A detailed mean field theory (MFT) based on pair approximation (PA) is constructed to illustrate the kinetic phase transition behavior of the dimer-monomer surface reaction model A+1/2B 2→AB and its variants which take into account diffusion and desorption of both adsorbed species, Eley-Rideal reaction step, finite reaction probability and “endon mechanism” for B 2 adsorption. We find that the PA-MFT can reproduce well the phase diagrams and yield quite good predictions of the effects of diffusion, desorption etc., which indicates that PA-MFT may be suitable for the description of the steady state behavior of this model.
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