HETEROGENEOUS CATALYSIS ON A DISORDERED SURFACE

We introduce a simple model of heterogeneous catalysis on a disordered surface which consists of two types of randomly distributed sites wit h different adsorption rates. Disorder can create a reactive steady st ate in situations where the same model on a homogeneous surface exhibi ts trivial kinetics with no steady state. A rich variety of kinetic be haviors occurs for the adsorbate concentrations and catalytic reaction rate as a function of model parameters.