Au on MgAl2O4 spinels: The effect of support surface properties in glycerol oxidation

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Journal of Catalysis

DOI:https://doi.org/10.1016/j.jcat.2010.07.022· OSTI ID:988724

Villa, Alberto ^[1]; Gaiassi, Aureliano ^[1]; Rossetti, Ilenia ^[1]; Bianchi, Claudia ^[1]; van Benthem, Klaus ^[2]; Veith, Gabriel M ^[2]; Prati, Laura ^[1]

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1. Universita di Milano, Italy
2. ORNL

Here we investigated the properties of Au nanoparticles, prepared via three different techniques and supported on three different MgAl2O4 spinels. The surface composition and area of the spinel plays an important role in determining the selectivity of the catalyst in the selective oxidation of glycerol. it was found that aluminum rich surfaces enhance the C-C bond cleavage reaction for large gold particles which is opposite of what is normally observed for large clusters which typically show no C-C cleavage. We also report that similarly sized AuNPs on the different MgAl2O4 spinels with the same surface Al/Mg ratio, show a similar selectivity; however activity depends on surface area.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 988724
• Journal Information: Journal of Catalysis, Vol. 275, Issue 1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
MAGNESIUM OXIDES
CATALYST SUPPORTS
SURFACE PROPERTIES
GLYCEROL
GOLD
OXIDATION
SPINELS
SURFACE AREA
CATALYTIC EFFECTS
glycerol oxidation
gold catalysts