A sustainable aqueous route to highly stable suspensions of monodispersed nano ruthenia

Sassoye, Capucine; Muller, Guillaume; Debecker, Damien; Karelovic, Alejandro; Cassaignon, Sophie; Pizarro, Christian; Ruiz, Patricio; Sanchez, Clement


Highly stable suspensions of monodispersed ruthenia nanoparticles have been prepared via a sustainable aqueous oxidative pathway. The nanoparticles (2 nm) have been thoroughly characterized by TEM, XRD, XPS, MS-TGA and thermodiffraction. The addition of hydrogen peroxide in the RuCl 3 solution provokes a fast oxidation of Ru(iii) ions into Ru(iv). This increases the rate of the hydrolysis/condensation reactions and further promotes the nucleation over the growth of the particles. The very high stability conditions of the colloidal suspension have been studied. This aqueous one-step process, which uses no organic solvent or toxic pollutant additive, is quick and produces calibrated ruthenia nanoparticles in high yields. It presents a green alternative to the preparation and use of ruthenia. As examples, two applications are presented. In the first, RuO 2 coatings have been tested for their electrical capacitance. In the second, RuO 2/TiO 2 catalysts, prepared from the controlled deposition of ruthenia nanoparticles on TiO 2 particles, have been proven to be highly effective for the production of methane from CO 2. This journal is © The Royal Society of Chemistry.

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Título según SCOPUS: A sustainable aqueous route to highly stable suspensions of monodispersed nano ruthenia
Título de la Revista: GREEN CHEMISTRY
Volumen: 13
Número: 11
Fecha de publicación: 2011
Página de inicio: 3230
Página final: 3237
Idioma: English


Notas: SCOPUS - ISI and Scopus DOI: 10.1039/C1GC15769H