Polymer versus phosphine stabilized Rh nanoparticles as components of supported catalysts : implication in the hydrogenation of cyclohexene model molecule
Ibrahim, M. (Institut national polytechnique (Toulouse))
Garcia, M. A. S. (Universidade de São Paulo. Departamento de Química Fundamental)
Vono, L. L. R. (Institut national polytechnique (Toulouse))
Guerrero, Miguel (Universitat Autònoma de Barcelona. Departament de Física)
Lecante, P. (Centre d'Élaboration de Matériaux et d'Etudes Structurales)
Rossi, L. M. (Universidade de São Paulo. Departamento de Química Fundamental)
Philippot, K. (Institut national polytechnique (Toulouse))

Data:	2016
Resum:	The solution synthesis of rhodium nanoparticles (Rh NPs) was achieved from the organometallic complex [Rh(η³-C₃H₅)₃] under mild reaction conditions in the presence of a polymer (PVP), a monophosphine (PPh₃) and a diphosphine (dppb) as a stabilizer, leading to very small Rh NPs of 2. 2, 1. 3 and 1. 7 nm mean size, with PVP, PPh3 and dppb, respectively. The surface properties of these nanoparticles were compared using a model catalysis reaction namely, hydrogenation of cyclohexene, first under colloidal conditions and then under supported conditions after their immobilization onto an amino functionalized silica-coated magnetite support. PVP-stabilized Rh NPs were the most active catalyst whatever the catalytic conditions as a result of a strong coordination of the phosphine ligands at the metal surface that blocks some surface atoms even after several recycles of the supported nanocatalysts and limit the reactivity of the metallic surface.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Rhodium nanoparticles ; Phosphine ; Polyvinylpyrrolidone ; Silica-coated ; Magnetite ; Catalysis ; Hydrogenation
Publicat a:	Dalton transactions, Vol. 45, no. 44 (Nov. 2016) , p. 17782-17791, ISSN 1477-9234

DOI: 10.1039/C6DT03104H

Post-print 26 p, 1.1 MB

El registre apareix a les col·leccions:
Articles > Articles de recerca
Articles > Articles publicats