Study of the local structure of supported nanostructural platinum catalysts

The possibility of controlling the state of platinum deposited on the support surface via minor changes in the catalyst preparation procedure is demonstrated using a series of highly dispersed Pt/γ-Al 2 O 3 catalysts with different particle size of the active component. Dispersity, local structure a...

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Bibliographic Details
Published in:Journal of structural chemistry 2010-12, Vol.51 (Suppl 1), p.11-19
Main Authors: Beck, I. É., Kriventsov, V. V., Ivanov, D. P., Yakimchuk, E. P., Novgorodov, B. N., Zaikovskii, V. I., Bukhtiyarov, V. I.
Format: Article
Language:English
Subjects:
Atomic
Atomic/Molecular Structure and Spectra
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Molecular
Optical and Plasma Physics
Physical Chemistry
Solid State Physics
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Summary:The possibility of controlling the state of platinum deposited on the support surface via minor changes in the catalyst preparation procedure is demonstrated using a series of highly dispersed Pt/γ-Al 2 O 3 catalysts with different particle size of the active component. Dispersity, local structure and electronic state of supported platinum were examined by a combination of high resolution transmission electron microscopy and X-ray absorption spectroscopy (EXAFS/XANES). It was shown that various platinum species can be obtained on the surface of the support: bulk or surface Pt(II) or Pt(IV) oxides, mixed metal-oxide structures, bulk particles of metallic platinum, and two-dimensional surface Pt 0 particles strongly interacting with the support.
ISSN:0022-4766
1573-8779
DOI:10.1007/s10947-010-0185-x