Abstract
The theory of charge‐transfer catalysis, originally proposed by Wagner and Hauffe, is set up in quantitative form. The objects of the treatment are to write down quantitative expressions for the absolute reaction rate, to show what are the consequences of the Wagner‐Hauffe mechanism insofar as they concern the adsorption properties of the individual reacting materials, and to outline an experimental program for determining, by means of experiments on the semiconductor, alone and in association with each of the reacting substances in turn, the values prevailing in a practical case for the various parameters occurring in the theory.