Articles producció científica> Química Física i Inorgànica

Surface characterisation of phosphine and phosphite stabilised Rh nanoparticles: a model study

  • Identification data

    Identifier: PC:2653
    Authors:
    Llop, J.Blondeau, P.Claver, C.Godard, C.
    Abstract:
    author can archive pre-print (ie pre-refereeing) author can archive post-print (ie final draft post-refereeing)
  • Others:

    Author, as appears in the article.: Llop, J.; Blondeau, P.; Claver, C.; Godard, C.
    Department: Química Analítica i Química Orgànica Química Física i Inorgànica
    URV's Author/s: LLOP CASTELBOU, JESSICA; BLONDEAU ., PASCAL JEAN CLAUDE LEON; CLAVER CABRERO, MARIA DEL CARMEN OROSIA; GODARD ., CYRIL
    Keywords: Rh nanoparticles
    Abstract: Small and well defined Rh nanoparticles (<2 nm) stabilised by the model ligands triphenylphosphine 1 and triphenylphosphite 2 were synthesised using various P/Rh ratios. In all cases, the crystalline NPs exhibited a spherical shape and a fcc structure. During the synthesis of these materials, hydrogenation and oxidation of the stabilisers take place and the degree of hydrogenation of the stabilising ligand increased when low ligand to Rh ratio is used during their synthesis. The Rh1 systems mainly contain adsorbed phosphine oxide species at their surface whereas the Rh2 systems include both phosphite and phosphite oxide species. Analysis of the surface of these nanoparticles by Infrared spectroscopy revealed the presence of Rh-H at the surface of the NPs and hydride titration experiments revealed a higher hydride coverage for the phosphine stabilized systems. By CO adsorption/Infrared experiments, bridging, terminal and geminal Rh(CO)2 sites were detected. All these systems were active catalysts in the hydrogenation of styrene and the observation of Rh(CO)2 sites could be correlated with the activity of these species for the hydrogenation of the aromatic ring.
    Research group: Organometàl.lics i Catàlisi Homogènia Grup de Quimiometria, Qualimetria i Nanosensors
    Thematic Areas: Chemistry Química Química
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 2046-2069
    Author identifier: 0000-0001-6462-4582; 0000-0003-1331-5055; 0000-0002-2518-7401; 0000-0001-5762-4904
    Record's date: 2017-03-22
    Last page: 97043
    Journal volume: 5
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2015/RA/C5RA21835G#!divAbstract
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1039/C5RA21835G
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2015
    First page: 97036
    Publication Type: Article Artículo Article
  • Keywords:

    Rodi -- Nanopartícules
    Rh nanoparticles
    Chemistry
    Química
    Química
    2046-2069
  • Documents:

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