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
关键词Pt/gamma-al2o3 Enantioselective Hydrogenation Ethyl Pyruvate Eopb Ft-ir Spectroscopy Co Adsorption Cinchonidine
刊名TOPICS IN CATALYSIS
2003-11-01
25期:1-4页:63-70
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Applied ; Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]FIXED-BED REACTOR ; ETHYL PYRUVATE ; PLATINUM CATALYSTS ; PT/AL2O3 CATALYST ; METAL-CATALYSTS ; CINCHONIDINE ; NANOCLUSTERS ; MODIFIER ; DESIGN
英文摘要Pt/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.
语种英语
WOS记录号WOS:000186547700007
引用统计
被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138281
专题中国科学院大连化学物理研究所
作者单位1.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
推荐引用方式
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.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, XH]的文章
[You, X]的文章
[Ying, PL]的文章
百度学术
百度学术中相似的文章
[Li, XH]的文章
[You, X]的文章
[Ying, PL]的文章
必应学术
必应学术中相似的文章
[Li, XH]的文章
[You, X]的文章
[Ying, PL]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。