关键词: α-烷基取代苯甲醇, Pd/C催化剂, 高氯酸, 助催化剂, 机理

Abstract: α-Alkyl benzoic alcohol is hydrogenated over Pd/C in the H₂-HAc-HClO₄ system into the corresponding branched-alkyl benzene.The influence of the reaction temperature, hydrogen gas pressure and the amount of catalyst is investigated.Perchloric acid as co-catalyst plays a key role in relation to the catalyst activity.Room temperature (15—30℃), H₂ pressure (400—800 kPa), and 5%—10% Pd/C catalyst by mass are the optimum conditions for this hydrogenation reaction.Perchloric acid as co-catalyst can lead to formation of PdO_xCl_y cluster on the surface of Pd during the hydrogenation reaction.PdO_xCl_y cluster may be a new active center, which enhances the activity of catalyst.

Key words: α-烷基取代苯甲醇, Pd/C催化剂, 高氯酸, 助催化剂, 机理