Nanoassembled model catalysts: changing efficiency and selectivity atom-by-atom

A review; 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)]     «

A review; 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 s...     »

Oxidation catalysts (for CO nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Hydrogenation catalysts (for C4H4 nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Polymerization catalysts (for acetylene nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Clusters (metal nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Intermediates Role: FMU (Formation, unclassified), RCT (Reactant), FORM (Formation, nonpreparative), RACT (Reactant or reagent) (nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Cyclotrimerization catalysts (of C4H4 nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) nanoassembled model catalyst changing efficiency selectivity atom gold cluster nanoassembled catalyst carbon monoxide oxidn acetylene polymn palladium cluster nanoassembled catalyst hydrocarbon intermediate cyclotrimerization hydrogenation palladium cluster nanoassembled catalyst     «

Oxidation catalysts (for CO nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Hydrogenation catalysts (for C4H4 nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Polymerization catalysts (for acetylene nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Clusters (metal nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom) Intermediates Role: FMU (Formation, unclassifi...     »

CAN 137:115081 67-2 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institute of Surface Chemistry and Catalysis, University of Ulm, Ulm, Germany. Journal 0272-9172 1120-53-2 (1,3-Cyclobutadiene) Role: FMU (Formation, unclassified), RCT (Reactant), FORM (Formation, nonpreparative), RACT (Reactant or reagent) (cyclotrimerization and hydrogenation of; nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom); 1309-48-4 (Magnesia); 7440-05-3D (Palladium); 7440-57-5D (Gold); 66554-19-6 (Palladium cluster(Pd6)); 118364-96-8 (Palladium cluster(Pd3)); 145536-84-1 (Gold cluster(Au8)); 151247-60-8; 266317-62-8 Role: CAT (Catalyst use), PRP (Properties), USES (Uses) (nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom); 630-08-0 (Carbon monoxide) Role: RCT (Reactant), RACT (Reactant or reagent) (oxidn. of; nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom); 74-86-2 (Acetylene) Role: RCT (Reactant), RACT (Reactant or reagent) (polymn. of; nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom)     «

CAN 137:115081 67-2 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institute of Surface Chemistry and Catalysis, University of Ulm, Ulm, Germany. Journal 0272-9172 1120-53-2 (1,3-Cyclobutadiene) Role: FMU (Formation, unclassified), RCT (Reactant), FORM (Formation, nonpreparative), RACT (Reactant or reagent) (cyclotrimerization and hydrogenation of; nanoassembled model catalysts and changing efficiency and selectivity atom-by-atom); 1309-48-4 (Magnesia); 7440-05-3D (Palladium)...     »