Publication Date:
2012-09-04
Description:
Monometallic nanocomposites are obtained with the use of supercritical carbon dioxide (fluid technique) and metal-vapor synthesis (MVS), while bimetallic nanocomposites of Pt and Au noble metals and γ-Al 2 O 3 oxide matrix are synthesized by a combination of these two methods. The structures, concentrations, and chemical states of metal atoms in composites are studied by means of small-angle X-ray scattering (SAXS), transparent electron microscopy (TEM), X-ray fluorescent analysis (XFA), and X-ray photoelectron spectroscopy (XPS). The neutral state of metal atoms in clusters is shown by XPS and their size distribution is found according to SAXS; as is shown, it is determined by the pore sizes of the oxide matrices and lies in the range of 1 to 50 nm. The obtained composites manifest themselves as effective catalysts in the oxidation of CO to CO 2 . Content Type Journal Article Category Physical Chemistry of Nanoclusters and Nanomaterials Pages 1602-1608 DOI 10.1134/S0036024412100214 Authors E. E. Said-Galiev, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia A. Yu. Vasil’kov, Department of Chemistry, Moscow State University, Moscow, 119992 Russia A. Yu. Nikolaev, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia A. I. Lisitsyn, Department of Chemistry, Moscow State University, Moscow, 119992 Russia A. V. Naumkin, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia I. O. Volkov, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia S. S. Abramchuk, Department of Chemistry, Moscow State University, Moscow, 119992 Russia O. L. Lependina, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia A. R. Khokhlov, Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119991 Russia E. V. Shtykova, Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, 117333 Russia K. A. Dembo, Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, 117333 Russia C. Erkey, Department of Chemical and Biological Engineering, Koc University, Istanbul, 34450 Turkey Journal Russian Journal of Physical Chemistry A, Focus on Chemistry Online ISSN 1531-863X Print ISSN 0036-0244 Journal Volume Volume 86 Journal Issue Volume 86, Number 10
Print ISSN:
0036-0244
Electronic ISSN:
1531-863X
Topics:
Chemistry and Pharmacology
,
Physics
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