THE EFFECT OF FRACTAL DIMENSION OF POROUS CATALYSTS ON THE ACTIVATION ENERGY OF CO OXIDATION

An approach based on the interrelationship between the activation energy of the rate-limiting step of a heterogeneous catalytic reaction and the structure of the catalyst surface expressed in terms of fractal geometry is presented for the example of the oxidation of carbon monoxide. The activation energy of this reaction was shown to increase with increasing nonuniformity of the catalyst surface given by the fractal dimension DF