Reactivity of crotonaldehyde and propene over Au/Pd(111) surfaces

被引：21

作者：

Naughton, James ^{[2
]}

Lee, Adam F. ^{[1
]}

Thompson, Sarah ^{[2
]}

Vinod, C. P. ^{[1
]}

Wilson, Karen ^{[1
]}

机构：

[1] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam, Wales

[2] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2010年 / 12卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

ALPHA; BETA-UNSATURATED ALDEHYDES; SELECTIVE OXIDATION; AEROBIC OXIDATION; CROTYL ALCOHOL; FORMIC-ACID; X-RAY; ADSORPTION; PT(111); FORMALDEHYDE; ACROLEIN;

D O I：

10.1039/b921669c

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：

The surface chemistry of crotonaldehyde and propene, primary and secondary reaction products in the aerobic selective oxidation of crotyl alcohol, has been studied by temperature-programmed reaction over Au/Pd(111) surface alloys. Gold strongly promotes desorption versus reaction at mole fractions >= 0.3 (crotonaldehyde) and >= 0.8 (C3H6); only similar to 5% of the chemisorbed aldehyde or alkene react over Au-rich alloys. Surprisingly, co-adsorbed oxygen strongly suppresses crotonaldehyde decomposition over both clean Pd(111) and alloy surfaces, while C3H6 combustion, an important undesired side-reaction over unpromoted Pd(111), is also moderated by Au.

引用

页码：2670 / 2678

页数：9

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