The influence of the medium on the mechanical properties of catalysts

The phenomena involving a decrease in the mechanical strength and durability of catalysts during their use, which can be explained in the light of ideas concerning the mutual influence of the solid phase and the medium during catalysis, are examined. Analysis of the mechanism and the set of conditions inducing these phenomena makes it possible to develop methods for a significant improvement of the quality of a catalyst. It is shown that the appearance on the catalyst surface of a multiplicity of mobile adsorbed atoms on dissociation of chemical bonds during the catalytic reaction can give rise to the acceleration of the surface self-diffusion by a large factor, which promotes a significant decrease in the temperature of the sintering of powdered materials. The bibliography includes 105 references.