  We study the kinetics of bimolecular, catalytically-activated reactions
(CARs) in d-dimensions. The elementary reaction act between reactants takes
place only when these meet in the vicinity of a catalytic site; such sites are
assumed to be immobile and randomly distributed in space. For CARs we develop a
kinetic formalism, based on Collins-Kimball-type ideas; within this formalism
we obtain explicit expressions for the effective reaction rates and for the
decay of the reactants' concentrations.
