Pd/SiC催化苯乙酮加氢反应的性能OA北大核心CSTPCD

Pd catalysts supported on high specific surface area SiC were prepared using a liquid phase reduction method and characterized by XRD,TEM,XPS.The performance of Pd/SiC catalysts in the acetophenone hydrogenation reaction was studied,and the activation role of the SiC surface in the catalytic process was discussed.The results indicated that the 3%(w)Pd/SiC catalyst effectively catalyzed the acetophenone hydrogenation reaction at room temperature and atmospheric H2 pressure,achieving both acetophenone conversion and 1-phenylethanol selectivity above 95%after 4 h of reaction.TEM and XRD results showed that Pd particles were uniformly dispersed on the SiC surface,with an average particle size of approximately 3.1 nm.Catalyst dilution experiments demonstrated that the SiC support could adsorb and activate acetophenone.During the catalytic process,acetophenone is activated on the SiC surface,while H2 is dissociated on the Pd surface to produce active hydrogen,and the active hydrogen spills over to the SiC surface to react with the activated acetophenone.