Abstract
The paper addresses the catalytic activity of oxygen-containing Cu-Co-Fe catalysts applied onto carbon nanotubes in the CO oxidation reaction. The carbon nanotubes were synthesized on an Fe2O3catalyst. The activity of oxide-containing Cu-Co-Fe catalysts is shown to depend on the treatment of metal-carbon precursor material, amount of the active component and method of its application. According to the X-ray phase analysis, thermal desorption mass spectroscopy, and transmission electron microscopy, the active component is a mixture of Cu2(OH)3NO3 and CuO phases whose ratio and distribution depend on the catalyst optimal synthesis conditions, which provide the structural formation of active sites in the CO oxidation reaction. The presence of an active Cu-Co-Fe oxide component in the surface layer, which is produced by a single application of the active component to carbon nanotubes, results in a higher activity of the catalysts in the CO oxidation in comparison to the catalysts prepared by a step-wise application of the active component.
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Original Russian Text © E.V. Ishchenko, S.V. Gaidai, A.G. Dyachenko, E.V. Prilutskiy, A.A. Beda, T.M. Zakharova, 2014, published in Sverkhtverdye Materialy, 2014, Vol. 36, No. 2, pp. 24–32.
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Ishchenko, E.V., Gaidai, S.V., Dyachenko, A.G. et al. The Cu-Co-Fe oxide system applied to carbon nanotubes synthesized on Fe2O3 . J. Superhard Mater. 36, 82–88 (2014). https://doi.org/10.3103/S1063457614020026
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DOI: https://doi.org/10.3103/S1063457614020026