Catalytic properties of nanostructured Pt and Ru metal clusters over alumina promoted by CeO2

0.5%Pt-0.5%Ru/2%Ce/(theta+alpha)-Al2O3, reduced by H2 at 1173K, presents a mixture of Pt and Ru (3-30nm) nanoparticles in reduced and partially oxidised condition surrounded by larger formations of surface compound CeAlO3 with perovskite structure and oxide Ce6O11 (15-80nm). High conversion of CH4 a...

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Bibliographic Details
Published in:Journal of alloys and compounds 2007-05, Vol.434-435, p.796-798
Main Authors: Dossumov, K., Salakhova, R.Kh, Popova, N.M., Tungatarova, S.A., Grigorieva, V.P., Komashko, L.V., Sass, A.S.
Format: Article
Language:English
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Summary:0.5%Pt-0.5%Ru/2%Ce/(theta+alpha)-Al2O3, reduced by H2 at 1173K, presents a mixture of Pt and Ru (3-30nm) nanoparticles in reduced and partially oxidised condition surrounded by larger formations of surface compound CeAlO3 with perovskite structure and oxide Ce6O11 (15-80nm). High conversion of CH4 and selectivity for CO and H2 (close to 100%) at short contact times (2.35-8X10-3s) are observed by using that catalyst in catalytic partial oxidation of CH4 to synthesis-gas at 1173K and atmospheric pressure. Methane is activated on Pt and Ru metal clusters while oxygen is activated on Ce oxide nanostructures.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2006.08.187