DICP OpenIR
Some insights into the preparation of Pt/gamma-Al2O3 catalysts for the enantioselective hydrogenation of alpha-ketoesters
Li, XH; You, X; Ying, PL; Xiao, JL; Li, C
KeywordPt/gamma-al2o3 Enantioselective Hydrogenation Ethyl Pyruvate Eopb Ft-ir Spectroscopy Co Adsorption Cinchonidine
Source PublicationTOPICS IN CATALYSIS
2003-11-01
Volume25Issue:1-4Pages:63-70
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Applied ; Chemistry, Physical
WOS Research AreaChemistry
WOS KeywordFIXED-BED REACTOR ; ETHYL PYRUVATE ; PLATINUM CATALYSTS ; PT/AL2O3 CATALYST ; METAL-CATALYSTS ; CINCHONIDINE ; NANOCLUSTERS ; MODIFIER ; DESIGN
AbstractPt/gamma-Al2O3 catalysts were prepared by two different impregnation methods and characterized by XRD, TEM, and CO chemisorption. The Pt particle sizes ranged in 2.4-23.3 nm for these 5.0 wt% Pt/gamma-Al2O3 catalysts. The catalysts were also characterized by FT-IR spectroscopy using CO as a probe molecule before and after the chiral modi. cation with cinchonidine. Two IR bands (2078 and 2060 cm(-1)) due to CO linearly adsorbed on the Pt/gamma-Al2O3 catalyst, calcined at 500degreesC before reduction in sodium formate solution were observed, whereas only one IR band at similar to2070 cm(-1) was observed for other catalysts. A red shift of the IR band was observed after chiral modi. cation of all the catalysts, except the one with the largest Pt particle size and lowest Pt dispersion. The catalytic performance of the cinchonidine-modified Pt/gamma-Al2O3 catalysts was tested for the enantioselective hydrogenations of ethyl pyruvate and ethyl 2-oxo-4-phenylbutyrate (EOPB). A 95% ee value was obtained for the ethyl pyruvate hydrogenation and about 83% ee was achieved for the enantioselective hydrogenation of EOPB under the optimized preparation and reaction conditions. It is deduced that the interaction of Pt with gamma-Al2O3 is a crucial factor for obtaining high activity and that the adsorption abilities (adsorption of reactant, solvent and chiral modifier molecules) of the catalyst surface affect the catalytic performance significantly.
Language英语
WOS IDWOS:000186547700007
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138281
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Liverpool, Dept Chem, Leverhulme Ctr Innovat Catalysis, Liverpool L69 7ZD, Merseyside, England
Recommended Citation
GB/T 7714
Li, XH,You, X,Ying, PL,et al. Some insights into the preparation of Pt/gamma-Al2O3 catalysts for the enantioselective hydrogenation of alpha-ketoesters[J]. TOPICS IN CATALYSIS,2003,25(1-4):63-70.
APA Li, XH,You, X,Ying, PL,Xiao, JL,&Li, C.(2003).Some insights into the preparation of Pt/gamma-Al2O3 catalysts for the enantioselective hydrogenation of alpha-ketoesters.TOPICS IN CATALYSIS,25(1-4),63-70.
MLA Li, XH,et al."Some insights into the preparation of Pt/gamma-Al2O3 catalysts for the enantioselective hydrogenation of alpha-ketoesters".TOPICS IN CATALYSIS 25.1-4(2003):63-70.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, XH]'s Articles
[You, X]'s Articles
[Ying, PL]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, XH]'s Articles
[You, X]'s Articles
[Ying, PL]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, XH]'s Articles
[You, X]'s Articles
[Ying, PL]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.