title: Tin-decorated ruthenium nanoparticles: a way to tune selectivity in hydrogenation reaction.
abstract: Two series of ruthenium nanoparticles stabilized either by a polymer (polyvinylpyrrolidone; Ru/PVP) or a ligand (bisdiphenylphosphinobutane; Ru/dppb) were reacted with tributyltin hydride [(n-C4H9)3SnH] leading to tin-decorated ruthenium nanoparticles, Ru/PVP/Sn and Ru/dppb/Sn. The Sn/Ru molar ratio was varied in order to study the influence of the surface tin content on the properties of these new nanoparticles, by comparison with Ru/PVP and Ru/dppb. Besides HRTEM and WAXS analyses, spectroscopic techniques (IR, NMR and Mössbauer) combined with theoretical calculations and a simple catalytic test (styrene hydrogenation) allowed us to evidence the formation of μ(3)-bridging "SnR" groups on the ruthenium surface as well as to rationalize their influence on surface chemistry and catalytic activity.
authors.affiliation: Laboratoire de Chimie de Coordination, CNRS, LCC, 205 Route de Narbonne, F-31077 Toulouse, France. karine.philippot@lcc-toulouse.fr.
authors.forename: Eric
authors.initials: E
authors.lastname: Bonnefille
authors.forename: Fernando
authors.initials: F
authors.lastname: Novio
authors.forename: Torsten
authors.initials: T
authors.lastname: Gutmann
authors.forename: Romuald
authors.initials: R
authors.lastname: Poteau
authors.forename: Pierre
authors.initials: P
authors.lastname: Lecante
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Jumas
authors.forename: Karine
authors.initials: K
authors.lastname: Philippot
authors.forename: Bruno
authors.initials: B
authors.lastname: Chaudret