Heterogeneous Catalysis in Organic Chemistry. 6. An Experimental Description of the Nature of the Hydrogenation Sites Present on Dispersed Pt Catalysts

Article abstract of DOI:10.1021/jo00386a005

Ten Pt/controlled pore glass (CPG) catalysts having different reactive site densities as determined by single turnover (STO) characterizations were used to catalyze the dehydrogenation of cyclohexane to benzene under conditions previously used for the Pt single-crystal catalysis of this same reaction.It was found that the extent of benzene formation was related to the number of STO hydrogenation sites present on the catalyst.Since the single-crystal study showed that this dehydrogenation reaction occured over corner atoms, it is concluded that the hydrogenation sites on the dispersed Pt catalysts are corner atoms as previously implied on mechanistic considerations.