Influence of surface diffusion on catalytic reactivity of spatially inhomogeneous surfaces mean field modeling

TL;DR

This paper investigates how surface diffusion affects catalytic reaction rates on inhomogeneous surfaces using an extended mean-field model, revealing cooperative effects and the importance of surface arrangement.

Contribution

It introduces an extended mean-field model that accounts for surface inhomogeneities and diffusion, highlighting their impact on catalytic kinetics and cooperative effects.

Findings

Surface diffusion influences reaction rates on inhomogeneous surfaces.

Cooperative effects between active and inactive sites are demonstrated.

Mean-field modeling can effectively study catalytic phenomena on nonuniform surfaces.

Abstract

Kinetics of model catalytic processes proceeding on inhomogeneous surfaces is studied. We employ an extended mean-field model that takes into account surface inhomogeneities. The influence of surface diffusion of adsorbent on the kinetics of the catalytic process is investigated. It is shown that diffusion is responsible for differences in the reaction rate of systems with different arrangements of active sites. The presence of cooperative effects between inactive and active sites is demonstrated and the conditions when these effects are important are discussed. We show that basic catalytic phenomena on nonuniform surfaces can be studied with mean-field modeling methods.