期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 276, 期 1-2, 页码 191-196出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2007.07.003
关键词
Pt nanoparticles; single-walled carbon nanotube; asymmetric hydrogenation
In order to be applied in heterogeneous asymmetric hydrogenation, a series of Single-Walled Carbon Nanotubes (SWNTs)-supported Pt nanoparticle catalysts with different controlled Pt loadings, i.e. 5%, 10% and 20%, were prepared, and characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). By modification with (-)-cinchonidine (Cd), these Pt/SWNTs catalysts were found to be efficient for the asymmetric hydrogenation of ethyl pyruvate, providing (R)-ethyl lactate in high activity and moderate enantioselectivity. Kinetic study showed that the PT/SWNTs-catalyzed asymmetric hydrogenation of ethyl pyruvate was a ligand-accelerated reaction. (C) 2007 Elsevier B.V. All rights reserved.
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