Oxidation of glycerol using gold-palladium alloy-supported nanocrystals

被引：137

作者：

Dimitratos, Nikolaos ^{[1
]}

Lopez-Sanchez, Jose Antonio ^{[1
]}

Anthonykutty, Jinto Manjaly ^{[1
]}

Brett, Gemma ^{[1
]}

Carley, Albert F. ^{[1
]}

Tiruvalam, Ram Chandra ^{[2
]}

Herzing, Andrew A. ^{[2
]}

Kiely, Christopher J. ^{[2
]}

Knight, David W. ^{[1
]}

Hutchings, Graham J. ^{[1
]}

机构：

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

[2] Lehigh Univ, Ctr Adv Mat & Nanotechnol, Bethlehem, PA 18015 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 25期

关键词：

LIQUID-PHASE OXIDATION; SELECTIVE OXIDATION; HYDROGEN-PEROXIDE; PARTICLE-SIZE; AU; CATALYSTS; PD; H-2; NANOPARTICLES; CARBON;

D O I：

10.1039/b904317a

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 use of bio-renewable resources for the generation of materials and chemicals continues to attract significant research attention. Glycerol, a by-product from biodiesel manufacture, is a highly functionalised renewable raw material, and in this paper the oxidation of glycerol in the presence of base using supported gold, palladium and gold-palladium alloys is described and discussed. Two supports, TiO2 and carbon, and two preparation methods, wet impregnation and sol-immobilisation, are compared and contrasted. For the monometallic catalysts prepared by impregnation similar activities are observed for Au and Pd, but the carbon-supported monometallic catalysts are more active than those on TiO2. Glycerate is the major product and lesser amounts of tartronate, glycolate, oxalate and formate are observed, suggesting a sequential oxidation pathway. Combining the gold and palladium as supported alloy nanocrystals leads to a significant enhancement in catalyst activity and the TiO2-supported catalysts are significantly more active for the impregnated catalysts. The use of a sol-immobilisation preparation method as compared to impregnation leads to the highest activity alloy catalysts and the origins of these activity trends are discussed.

引用

页码：4952 / 4961

页数：10

共 53 条

[1] A collaborative effect between gold and a support induces the selective oxidation of alcohols [J].