Overall surface coverage within the corrected Temkin nonuniformity model

The assumption of a "medium covered" nonuniform surface, essential in deriv ation of the Temkin model (TM), is critically examined in connection with t he recently proposed corrected model (CTM). Overall coverages for constant and exponential distribution are calculated within both TM and CTM, for sev eral values of distribution parameters. Comparison of the obtained results reveals a certain inconsistency of the original model and its failure for s ome parameter ranges and the accurate behavior of the corrected version of the model within broader domains of distribution parameters. Consequently, the validity of the medium coverages assumption was only proved in restrict ed nonuniformity conditions.