Gold Stabilized Aqueous Sols Immobilized on Mesoporous CeO2-Al2O3 as Catalysts for the Preferential Oxidation of Carbon Monoxide
Articolo
Data di Pubblicazione:
2010
Citazione:
Gold Stabilized Aqueous Sols Immobilized on Mesoporous CeO2-Al2O3 as Catalysts for the Preferential Oxidation of Carbon Monoxide / L. Storaro, M. Lenarda, E. Moretti, A. Talon, F. Porta, B. Moltrasio, P. Canton. - In: JOURNAL OF COLLOID AND INTERFACE SCIENCE. - ISSN 0021-9797. - 350:2(2010), pp. 435-442. [10.1016/j.jcis.2010.06.062]
Abstract:
Nanostructured Au/Al2O3-CeO2 catalysts with a low content of precious metal (0.9%wt.) were prepared immobilizing two different stabilized Au sols on a high surface area Al2O3-CeO2 mixed oxide with a uniform pore size distribution, synthesized by a one-pot methodology. The samples were characterized by elemental analysis, N2 physisorption, XRPD, TEM and 27Al-MAS NMR techniques. The catalytic activity of the two samples in the preferential oxidation of CO in excess of H2 (CO-PROX) was comparatively evaluated in the 35-110°C temperature range. The Au-THPS/AlCe20 sample, prepared immobilizing a sol obtained reducing an aqueous solution of gold tetrachloroaurate salt with bis[tetrakis(hydroxymethyl)phosphonium sulfate], resulted very active and selective at low temperatures and its catalytic activity was correlated with the structural characteristics of the metal particles and of the ordered mesoporous support.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
L. Storaro, M. Lenarda, E. Moretti, A. Talon, F. Porta, B. Moltrasio, P. Canton
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