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• W2891623072 abstract "The adsorption kinetics of CO on PdAu bimetallic clusters, containing 140 $pm$ 12 atoms and a composition varying between 0% and 55% of Pd atoms, is investigated by a pulsed molecular beam method (MBRS). The clusters are grown on a nanostructured ultrathin film of alumina on Ni3Al (111) playing the role of a template which gives a hexagonal array of bimetallic clusters having a sharp size distribution and a uniform composition. The surface concentration calculated, assuming segregation of gold to the surface, varies between 0 and 90% of Au atoms on the surface. From the adsorption-desorption kinetics of CO, the lifetime of CO is measured at various temperatures. At low coverage, plotting the CO lifetime in an Arrhenius diagram one obtains the adsorption energy of CO. When the surface concentration of Au increases, the adsorption energy of CO on the PdAu clusters decreases. This evolution of the adsorption energy is discussed, from previous studies, in term of ligand and ensemble effects. We find that the ensemble effect plays a dominant role in the observed decrease of the adsorption energy of CO." @default.
• W2891623072 created "2018-09-27" @default.
• W2891623072 creator A5045475004 @default.
• W2891623072 creator A5090858776 @default.
• W2891623072 date "2018-09-20" @default.
• W2891623072 modified "2023-09-25" @default.
• W2891623072 title "Molecular Beam Study of the CO Adsorption on a Regular Array of PdAu Clusters on Alumina" @default.
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• W2891623072 doi "https://doi.org/10.1021/acs.jpcc.8b07350" @default.
• W2891623072 hasPublicationYear "2018" @default.
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