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Oxidation of glycerol using gold-palladium alloy-supported nanocrystals.
- Source :
-
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2009 Jul 07; Vol. 11 (25), pp. 4952-61. Date of Electronic Publication: 2009 Apr 17. - Publication Year :
- 2009
-
Abstract
- 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, TiO(2) 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 TiO(2). 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 TiO(2)-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.
Details
- Language :
- English
- ISSN :
- 1463-9076
- Volume :
- 11
- Issue :
- 25
- Database :
- MEDLINE
- Journal :
- Physical chemistry chemical physics : PCCP
- Publication Type :
- Academic Journal
- Accession number :
- 19562125
- Full Text :
- https://doi.org/10.1039/b904317a