Abstract
The catalytic activity of a colloidal catalyst based on iron(III) oxides in decomposition of H2O2 is studied. The catalyst is obtained by hydrolysis followed by peptization of FeCl3 · 6H2O salt in water in the presence of 1% ethanol. The structure, composition, and size of colloidal particles of the catalyst are studied by the methods of Mössbauer spectroscopy, X-ray fluorescence, X-ray diffraction, and transmission electron microscopy. The obtained catalyst is based on α-Fe2O3 crystals with an admixture of other crystalline structures of iron oxides and carbon-containing compounds. The activity of the catalyst with respect to H2O2 decomposition undergoes nonlinear and nonmonotonic variations and its particle size enlarges beginning from 1 to 3 nm with increasing initial concentration of FeCl3 · 6H2O. The catalyst obtained under optimal conditions exhibits high activity corresponding to the most efficient agents of H2O2 decomposition.
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Original Russian Text © V.I. Lesin, L.M. Pisarenko, O.T. Kasaikina, 2012, published in Kolloidnyi Zhurnal, 2012, vol.74, No. 1, pp. 90–95.
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Lesin, V.I., Pisarenko, L.M. & Kasaikina, O.T. Colloidal catalysts based on iron(III) oxides. 1. Decomposition of hydrogen peroxide. Colloid J 74, 85–90 (2012). https://doi.org/10.1134/S1061933X12010103
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DOI: https://doi.org/10.1134/S1061933X12010103