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Issue 11, 2011
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A sustainable aqueous route to highly stable suspensions of monodispersed nano ruthenia

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Abstract

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 RuCl3 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, RuO2 coatings have been tested for their electrical capacitance. In the second, RuO2/TiO2 catalysts, prepared from the controlled deposition of ruthenia nanoparticles on TiO2 particles, have been proven to be highly effective for the production of methane from CO2.

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

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Publication details

The article was received on 29 Jun 2011, accepted on 09 Aug 2011 and first published on 07 Sep 2011


Article type: Paper
DOI: 10.1039/C1GC15769H
Green Chem., 2011,13, 3230-3237

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

    C. Sassoye, G. Muller, D. P. Debecker, A. Karelovic, S. Cassaignon, C. Pizarro, P. Ruiz and C. Sanchez, Green Chem., 2011, 13, 3230
    DOI: 10.1039/C1GC15769H

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