Abstract
Abstract Correlations between the amount of hydrogen adsorption and the catalytic activities of the zeolite-supported platinum catalysts were interpreted in terms of the dispersion state of platinum particles. The activities for dehydrogenation of cyclohexane and hydrodemethylation of toluene were directly proprotional to the amount of hydrogen adsorption. The tiny platinum particles with diameters of less than 20 Å, which had little ability to chemisorb hydrogen, showed a poor activity in both reactions.
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