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- Title
Mechanochemical synthesis of CuO-CeO catalysts for the preferential oxidation of CO in the presence of H.
- Authors
Firsova, A.; Morozova, O.; Leonov, A.; Streletskii, A.; Korchak, V.
- Abstract
Mechanochemical activation was used in the synthesis of CuO-CeO catalysts for the preferential oxidation of CO in the presence of excess H. Catalysts similar in properties to supported CuO/CeO systems were prepared from mixtures of copper oxide (5 or 10 wt % CuO) and cerium dioxide with the use of mechanochemical activation. It was found that the time of mechanochemical activation influences the catalytic properties: a maximum conversion of CO into CO (97%) at 140°C was achieved with a sample of 10 wt % CuO-90 wt % CeO after mechanochemical activation in a ball mill for 90 min. Changes in the phase compositions of the catalysts depending on mechanochemical activation time and reaction mixture composition were studied by X-ray diffraction. The interaction of the oxides of copper and cerium in the process of mechanochemical activation with the formation of new Cu-O-Ce surface structures, which, supposedly constitute active sites for CO oxidation, was found using differential scanning calorimetry and differential thermogravimetric analysis.
- Subjects
MECHANICAL chemistry; COPPER oxide; CERIUM oxides; X-ray diffraction; THERMOGRAVIMETRY
- Publication
Kinetics & Catalysis, 2014, Vol 55, Issue 6, p777
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158414060068