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Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2013

Investigation of the surface chemistry of phosphine-stabilized ruthenium nanoparticles - an advanced solid-state NMR study

Résumé

31 P-13C REDOR NMR measurements allowed a reasonable approximation of distances between stabilizing ligands and carbon monoxide (CO) molecules on the surface of phosphine-stabilized ruthenium nanoparticles (RuNPs). The studied systems are RuNPs in the size range of 1-2 nm stabilized with 1,3,5-triaza-7-phosphaadamantane (PTA) or triphenylphosphine (PPh3) and exposed to a CO atmosphere. This study sheds some light on the interactions between CO and phosphine molecules as well as on their binding geometries on the surface of the RuNPs. As information on the ligand location and mobility is precious for the understanding of the chemical and catalytic properties of nanoparticles, these results support the interest of using sophisticated NMR tools to investigate their surface chemistry.
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Dates et versions

hal-00995693 , version 1 (23-05-2014)

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Torsten Gutmann, Eric Bonnefille, Hergen Breitzke, Pierre-Jean Debouttière, Karine Philippot, et al.. Investigation of the surface chemistry of phosphine-stabilized ruthenium nanoparticles - an advanced solid-state NMR study. Physical Chemistry Chemical Physics, 2013, 15 (40), pp.17383-17394. ⟨10.1039/C3CP52927D⟩. ⟨hal-00995693⟩
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