Electrochemical evaluation of the morphology and enantioselectivity of Pt/graphite

被引：52
作者：
Attard, GA
Gillies, JE
Harris, CA
Jenkins, DJ
Johnston, P
Price, MA
Watson, DJ
Wells, PB
机构：
[1] Univ Wales Coll Cardiff, Dept Chem, Cardiff CF10 3TB, S Glam, Wales
[2] Johnson Matthey, Royston SG8 5HE, Herts, England
来源：
APPLIED CATALYSIS A-GENERAL | 2001年 / 222卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
Pt/graphite; ethyl pyruvate; enantioselective hydrogenation; catalyst sintering; cyclic voltammetry; cinchonidine; cinchonine; dihydrocinchonidine; site selective alkaloid adsorption;
D O I：
10.1016/S0926-860X(01)00845-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cinchona-modified Pt/graphite is enantioselective for the hydrogenation of ethyl pyruvate to ethyl lactate at I bar pressure and 293 K. Cyclic voltammetry has been used to investigate (i) the surface morphology of the Pt particles in terms of the terraces, steps and kinks present in as-received and conditioned catalysts, (ii) the adsorption of the alkaloids cinchonidine, cinchonine and dihydrocinchonidine at conditioned surfaces and (iii) the changes in morphology that occur as catalysts are sintered. A reduction in the enantiomeric excess observed over sintered catalysts is interpreted in terms of the morphological changes observed. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：393 / 405
页数：13
相关论文
共 29 条
[1]   Surface reactivity at "chiral" platinum surfaces [J].
Ahmadi, A ;
Attard, G ;
Feliu, J ;
Rodes, A .
LANGMUIR, 1999, 15 (07) :2420-2424
[2]   Electrochemical and UHV characterisation of stepped Pt{100} electrode surfaces [J].
Al-Akl, A ;
Attard, G ;
Price, R ;
Timothy, B .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (16) :3261-3268
[3]   Voltammetric and UHV characterisation of the (1 x 1) and reconstructed hex-R0.7° phases of Pt{100} [J].
Al-Akl, A ;
Attard, GA ;
Price, R ;
Timothy, B .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 467 (1-2) :60-66
[4]   Electrochemical studies of enantioselectivity at chiral metal surfaces [J].
Attard, GA .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (16) :3158-3167
[5]   Temperature effects in the enantiomeric electro-oxidation of D- and L-glucose on Pt{643}S [J].
Attard, GA ;
Ahmadi, A ;
Feliu, J ;
Rodes, A ;
Herrero, E ;
Blais, S ;
Jerkiewicz, G .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (09) :1381-1385
[6]  
ATTARD GS, IN PRESS
[7]  
BAIKER A, 2000, CHIRAL CATALYST IMMO, P155
[8]  
BAIKER A, 1997, HDB HETEROGENEOUS CA, V5, P2422
[9]  
BLASER HU, 1991, STUD SURF SCI CATAL, V59, P73
[10]   INSITU PROBING OF STEP AND TERRACE SITES ON PT(S)-[N(111)X(111)] ELECTRODES [J].
CLAVILIER, J ;
ELACHI, K ;
RODES, A .
CHEMICAL PHYSICS, 1990, 141 (01) :1-14
123