화학공학소재연구정보센터
Catalysis Letters, Vol.132, No.3-4, 370-376, 2009
Preparation and Characterization of TiO2 Coated Multi-walled Carbon Nanotube-supported Pd and its Catalytic Performance in the Asymmetric Hydrogenation of alpha,beta-Unsaturated Carboxylic Acids
We report for the first time the application of nanotube-supported Pd catalyst in the enantioselective hydrogenation of alpha,beta-unsaturated carboxylic acids using cinchonidine as a chiral modifier. The preparation of titania coated multi-walled carbon nanotubes supporting Pd nanoparticles is described. The Pd particles prepared by deposition-precipitation from the aqueous phase and subsequent reduction in flow of hydrogen formed agglomerates supported on the titania coated nanotubes web. The support material was characterized by thermal analysis, X-ray diffraction, and transmission and scanning electron microscopy. Examination of the recovered catalyst by TEM and XRD showed minor deterioration of its structure after the hydrogenations.