The effects of the conditions of formation of Ag-Co zeolite supported systems on their activity in the oxidation of carbon monoxide

The activity of Ag-Co zeolite catalysts in the oxidation of CO was studied. The peculiarities of the formation of Ag-Co-NaX systems with different active metal ratios were studied. The temperatures of hydrogen absorption maxima in the H 2 temperature-programmed reduction spectra of Ag-Co-NaX systems...

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Bibliographic Details
Published inRussian Journal of Physical Chemistry A Vol. 82; no. 9; pp. 1460 - 1463
Main Authors Yatsimirskii, V. K., Oleksenko, L. P., Lutsenko, L. V., Chen, Yue
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.09.2008
Subjects
Chemistry
Chemistry and Materials Science
Physical Chemistry
The International Conference “Modern Physical Chemistry for Advanced Materials”
Bimetallic Catalyst
Silver Cation
Zeolite
Cobalt Cation
Hydrogen Absorption Maximum
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Summary:The activity of Ag-Co zeolite catalysts in the oxidation of CO was studied. The peculiarities of the formation of Ag-Co-NaX systems with different active metal ratios were studied. The temperatures of hydrogen absorption maxima in the H 2 temperature-programmed reduction spectra of Ag-Co-NaX systems with different Ag/Co ratios correlated with the catalytic activity in the oxidation of CO. Different valence states of silver (Ag + , Ag 0 ) and cobalt (Co 3+ , Co 2+ ) were observed by X-ray photoelectron spectroscopy. It was found that the mutual influence of these states in the surface layer of Ag-Co zeolite catalysts affected their activity.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024408090094