When Gold Is Not Noble: Nanoscale Gold Catalysts

While inert as bulk material, nanoscale gold particles dispersed on oxide supports exhibit a remarkable catalytic activity. Temp.-programmed reaction studies of the catalyzed combustion of CO on size-selected small monodispersed Aun (n ≤ 20) gold clusters supported on magnesia, and first-principle simulations, reveal the microscopic origins of the obsd. unusual catalytic activity, with Au8 found to be the smallest catalytically active size. Partial electron transfer from the surface to the gold cluster and oxygen-vacancy F-center defects are shown to play an essential role in the activation of nanosize gold clusters as catalysts for the combustion reaction. [on SciFinder(R)]     «

While inert as bulk material, nanoscale gold particles dispersed on oxide supports exhibit a remarkable catalytic activity. Temp.-programmed reaction studies of the catalyzed combustion of CO on size-selected small monodispersed Aun (n ≤ 20) gold clusters supported on magnesia, and first-principle simulations, reveal the microscopic origins of the obsd. unusual catalytic activity, with Au8 found to be the smallest catalytically active size. Partial electron transfer from the surface to the gol...     »

CAN 131:342551 67-1 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institut de Physique de la Matiere Condensee, Universite de Lausanne, Lausanne, Switz. Journal 1089-5639 630-08-0 (Carbon monoxide) Role: RCT (Reactant), RACT (Reactant or reagent) (combustion of; when gold is not noble and nanoscale gold catalysts); 1309-48-4 (Magnesia); 7440-57-5 (Gold); 7440-57-5D (Gold); 145536-84-1 (Gold cluster (au8)) Role: CAT (Catalyst use), PRP (Properties), USES (Uses) (when gold is not noble and nanoscale gold catalysts)     «

CAN 131:342551 67-1 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institut de Physique de la Matiere Condensee, Universite de Lausanne, Lausanne, Switz. Journal 1089-5639 630-08-0 (Carbon monoxide) Role: RCT (Reactant), RACT (Reactant or reagent) (combustion of; when gold is not noble and nanoscale gold catalysts); 1309-48-4 (Magnesia); 7440-57-5 (Gold); 7440-57-5D (Gold); 145536-84-1 (Gold cluster (au8)) Role: CAT (Catalyst use), PRP (Properties), USES (Uses) (when gold i...     »