4-Propylphenol Hydrogenation over Pt-Pd Bimetallic Catalyst in Aqueous Ethanol Solution without External Hydrogen

Ring-hydrogenation of 4-propylphenol (4-PP) to 4-propylcyclohexanone, cis- and trans-4-propylcyclohexanols proceeded over graphite-supported palladium catalysts (Pd/G) in aqueous ethanol solution at 573 K without using external hydrogen gas. Compared to Pd/G, graphite-supported platinum (Pt/G) catalysts were active only for hydrogen production and not for the ring-hydrogenation under the same reaction conditions. We have found that the addition...