Autor según el artículo: Llop, J.; Blondeau, P.; Claver, C.; Godard, C.
Departamento: Química Analítica i Química Orgànica Química Física i Inorgànica
Autor/es de la URV: LLOP CASTELBOU, JESSICA; BLONDEAU ., PASCAL JEAN CLAUDE LEON; CLAVER CABRERO, MARIA DEL CARMEN OROSIA; GODARD ., CYRIL
Palabras clave: Rh nanoparticles
Resumen: 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.
Grupo de investigación: Organometàl.lics i Catàlisi Homogènia Grup de Quimiometria, Qualimetria i Nanosensors
Áreas temáticas: Chemistry Química Química
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 2046-2069
Identificador del autor: 0000-0001-6462-4582; 0000-0003-1331-5055; 0000-0002-2518-7401; 0000-0001-5762-4904
Fecha de alta del registro: 2017-03-22
Página final: 97043
Volumen de revista: 5
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2015
Página inicial: 97036
Tipo de publicación: Article Artículo Article
Repositori URV