title: Transition from molecule to solid state: reactivity of supported metal clusters.
abstract: The evolution of the adsorption energy of carbon monoxide (CO) molecules on palladium (Pd) clusters as function of Pd particle size from the molecular regime (less than ~100 atoms per particle) to the bulk regime has been revealed. This adsorption energy is retrieved from the residence time of CO molecules on the Pd clusters, measured by a pulsed molecular beam technique, versus temperature. Unprecedented accuracy on the determination of the particle size has been achieved here by using a regular array of metal clusters exhibiting a size dispersion down to the ultimate limit of a Poisson distribution. This allows getting rid of the convolution effects that generally occur when considering particles grown through other techniques.
authors.affiliation: Centre Interdisciplinaire de Nanoscience de Marseille, Aix-Marseille Université/CNRS, UMR 7325, Campus de Luminy, Case 913, F-13288 Marseille cedex 09, France. sitja@cinam.univ-mrs.fr
authors.forename: Georges
authors.initials: G
authors.lastname: Sitja
authors.forename: Séverine
authors.initials: S
authors.lastname: Le Moal
authors.forename: Maxence
authors.initials: M
authors.lastname: Marsault
authors.forename: Guido
authors.initials: G
authors.lastname: Hamm
authors.forename: Frédéric
authors.initials: F
authors.lastname: Leroy
authors.forename: Claude R
authors.initials: CR
authors.lastname: Henry
mesh_terms: D002248:Carbon Monoxide / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature
chemical_list: D010165:Palladium; D002248:Carbon Monoxide