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Findings from University of Paris IV Broaden Understanding of Nanoparticles (Total oxidation of propane with a nano-RuO2/TiO2 catalyst)

August 22, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanoparticles have been published. According to news reporting out of Paris, France, by NewsRx editors, research stated, "An aqueous colloidal method was used to prepare 2 nm ruthenia nanoparticles from RuCl3 and H2O2. The nanoparticles were subsequently deposited onto a commercial TiO2 support and the obtained nanoRuO(2)/TiO2 catalyst was tested in the total oxidation of propane."

Our news journalists obtained a quote from the research from the University of Paris IV, "This catalyst is very active (T50 of 255 degrees C) and fully selective to CO2. However, much lower performance is achieved if the catalyst is heated above 300 degrees C-either ex situ during calcination or in situ in reaction conditions. We show that the changes in activity are strongly correlated with structural and chemical alteration of the catalyst during heating. These modifications are inspected by characterizing the catalyst after various heat treatments (N2physisorption, XPS, XRD, TEM, H2-TPR). At relatively early stages of heating or reaction (-'150-250 C) RuO2 nanoparticles migrate, leaving anatase TiO2 particles and accumulating on rutile TiO2 surface. At higher temperature, crystallization and sintering provoke irreversible alteration of the catalyst."

According to the news editors, the research concluded: "We suggest that more active VOC total oxidation catalysts could be obtained by avoiding unnecessary calcination step."

For more information on this research see: Total oxidation of propane with a nano-RuO2/TiO2 catalyst. Applied Catalysis A-General, 2014;481():11-18. Applied Catalysis A-General can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands (see also Nanoparticles).

Our news journalists report that additional information may be obtained by contacting D.P. Debecker, UPMC Univ Paris 06, Univ Paris 04, CNRS, Coll FranceUMR 7574, F-75005 Paris, France. Additional authors for this research include B. Farin, E.M. Gaigneaux, C. Sanchez and C. Sassoye.

Keywords for this news article include: Paris, France, Europe, Nanotechnology, Emerging Technologies

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Source: Science Letter

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