Abstract

A model is described of catalyst-reactant interaction. It implies that one role of the catalyst is to supply energy into that vibrational mode of the reactant that most effectively takes the system to the activated state. In this way the dissipation of energy from the excited molecule is effectively counteracted. By treating the system as the coupled, damped oscillator of classical mechanics, an expression is derived for the isocatalytic temperature (describing the ‘compensation effect’) in terms of the vibrational frequencies of the reactant and the catalyst system. Examples are given of the application of this model to studies on heterogeneous as well as homogeneous systems.

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