Chemical reactions on size-selected clusters on surfaces

Cluster-assembled materials open fascinating new routes for tuning phys. and chem. properties by changing cluster size and often these materials behave completely differently than their bulk analogs. By depositing gas phase cluster cations on various surfaces, cluster model catalysts are fabricated, which exhibit remarkable catalytic activity. While inert as bulk material, gold cluster catalysts oxidize carbon monoxide with Au8 to be the smallest active size. In contrast to the high selectivity of Pd(111) surfaces for the cyclotrimerization of acetylene, small supported Pdn clusters reveal a strongly size-dependent selectivity for the polymn. of acetylene and catalyze the cyclotrimerization as well as the hydrogenation of the formed intermediate C4H4. [on SciFinder(R)]     «

Cluster-assembled materials open fascinating new routes for tuning phys. and chem. properties by changing cluster size and often these materials behave completely differently than their bulk analogs. By depositing gas phase cluster cations on various surfaces, cluster model catalysts are fabricated, which exhibit remarkable catalytic activity. While inert as bulk material, gold cluster catalysts oxidize carbon monoxide with Au8 to be the smallest active size. In contrast to the high selectivity...     »

CAN 135:97793 66-3 Surface Chemistry and Colloids Universite de Lausanne, Institut de physique de la matiere condensee, Lausanne, Switz. Conference 7440-05-3 (Palladium); 66554-19-6 (Pd6); 118364-96-8 (Pd3); 145536-84-1 (Au8); 151247-60-8 (Palladium, mol. (Pd20)); 266317-62-8 (Palladium, mol. (Pd30)) Role: CAT (Catalyst use), PRP (Properties), USES (Uses) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces); 1309-48-4 (Magnesia) Role: NUU (Other use, unclassified), USES (Uses) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces); 74-86-2 (acetylene); 630-08-0 (Carbon monoxide) Role: PEP (Physical, engineering or chemical process), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces); 2873-50-9P (Butatriene) Role: RCT (Reactant), SPN (Synthetic preparation), PREP (Preparation), RACT (Reactant or reagent) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces); 71-43-2P (Benzene); 106-99-0P (Butadiene); 124-38-9P (Carbon dioxide); 25167-67-3P (Butene) Role: SPN (Synthetic preparation), PREP (Preparation) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces)     «

CAN 135:97793 66-3 Surface Chemistry and Colloids Universite de Lausanne, Institut de physique de la matiere condensee, Lausanne, Switz. Conference 7440-05-3 (Palladium); 66554-19-6 (Pd6); 118364-96-8 (Pd3); 145536-84-1 (Au8); 151247-60-8 (Palladium, mol. (Pd20)); 266317-62-8 (Palladium, mol. (Pd30)) Role: CAT (Catalyst use), PRP (Properties), USES (Uses) (chem. reactions on size-selected Au and Pd clusters on MgO surfaces); 1309-48-4 (Magnesia) Role: NUU (Other use, unclassified), USES (U...     »