Synthesis of monodispersed model catalysts using softlanding cluster deposition

In nanocatalysis, clusters deposited on solid, well-defined surfaces play an important role. For the detection of size effects it is, however, important to prep. samples consisting of deposited clusters of a single size, as their chem. properties change with the exact no. of atoms in the cluster. In this paper, the exptl. tools are presented to prep. such model systems. The existence of monodispersed clusters is confirmed by various exptl. findings. First, the carbonyl formation of deposited Nin clusters shows no change in the nuclearity when comparing the size of the deposited clusters with one of the formed carbonyls. Second, scanning tunneling microscopy (STM) studies show that fragmentation of Sin clusters upon deposition can be excluded. In addn., the adsorption behavior of CO on deposited Pd atoms points to the existence of single atoms on the surface. Furthermore, CO oxidn. results on Aun clusters confirm the existence of monodispersed clusters trapped on well-defined adsorption sites. Finally, we use Monte-Carlo simulations to define the range of clusters and defect densities, for which monodispersed clusters can be expected. [on SciFinder(R)]     «

In nanocatalysis, clusters deposited on solid, well-defined surfaces play an important role. For the detection of size effects it is, however, important to prep. samples consisting of deposited clusters of a single size, as their chem. properties change with the exact no. of atoms in the cluster. In this paper, the exptl. tools are presented to prep. such model systems. The existence of monodispersed clusters is confirmed by various exptl. findings. First, the carbonyl formation of deposited Nin...     »

Simulation and Modeling (Monte Carlo simulation synthesis of monodispersed model catalysts using softlanding cluster deposition) Oxidation catalysts (for CO synthesis of monodispersed model catalysts using softlanding cluster deposition) Clusters (metal synthesis of monodispersed model catalysts using softlanding cluster deposition) Carbonylation Catalysts Clusters Crystal defects (synthesis of monodispersed model catalysts using softlanding cluster deposition) Transition metals Role: CAT (Catalyst use), CPS (Chemical process), PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process), USES (Uses) (synthesis of monodispersed model catalysts using softlanding cluster deposition) synthesis monodispersed model catalyst softlanding cluster deposition nickel monodispersed model catalyst softlanding cluster deposition silicon monodispersed model catalyst softlanding cluster deposition gold monodispersed model catalyst softlanding cluster deposition palladium monodispersed model catalyst softlanding cluster deposition     «

Simulation and Modeling (Monte Carlo simulation synthesis of monodispersed model catalysts using softlanding cluster deposition) Oxidation catalysts (for CO synthesis of monodispersed model catalysts using softlanding cluster deposition) Clusters (metal synthesis of monodispersed model catalysts using softlanding cluster deposition) Carbonylation Catalysts Clusters Crystal defects (synthesis of monodispersed model catalysts using softlanding cluster deposition) Transition metals Role: CAT (Catal...     »

CAN 137:316457 67-1 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institute of Surface Chemistry and Catalysis, University of Ulm, Ulm, Germany. Journal 0033-4545 630-08-0 (Carbon monoxide) Role: RCT (Reactant), RACT (Reactant or reagent) (oxidn. of; synthesis of monodispersed model catalysts using softlanding cluster deposition); 7440-02-0D (Nickel); 7440-05-3 (Palladium); 7440-21-3D (Silicon); 7440-57-5D (Gold) Role: CAT (Catalyst use), CPS (Chemical process), PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process), USES (Uses) (synthesis of monodispersed model catalysts using softlanding cluster deposition)     «

CAN 137:316457 67-1 Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms Institute of Surface Chemistry and Catalysis, University of Ulm, Ulm, Germany. Journal 0033-4545 630-08-0 (Carbon monoxide) Role: RCT (Reactant), RACT (Reactant or reagent) (oxidn. of; synthesis of monodispersed model catalysts using softlanding cluster deposition); 7440-02-0D (Nickel); 7440-05-3 (Palladium); 7440-21-3D (Silicon); 7440-57-5D (Gold) Role: CAT (Catalyst use), CPS (Chemical process), PEP (Physi...     »