Abstract
A series of oxide catalysts modified with potassium cations, 1–5% K2О/CoFe2O4, with a spinel structure were obtained via mechanochemical synthesis. The obtained samples were studied via X-ray powder diffraction, nitrogen adsorption–desorption, temperature-programmed reduction with hydrogen, and temperature-programmed desorption of oxygen. It was shown that an increase in the potassium content leads to a significant decrease in the crystallinity of the oxide, an increase in the specific surface area, and the formation of weakly bound oxygen species; this favors an increase in the catalytic activity of the samples in the decomposition of nitrous oxide at 150–400°C. The most active catalyst was 5% K2О/CoFe2O4, which had the maximum content of weakly bound oxygen species. It was determined that the presence of oxygen or water in the rection mixture decreases the activity in the low-temperature catalytic decomposition of N2O.
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Funding
This work was performed at the Laboratory of Synthesis, Research, and Testing of Catalytic and Adsorption Systems for Hydrocarbon Processing, which was founded under the support of the Ministry of Science and Higher Education of the Russian Federation (project no. FZZW-2020-0010). It was also supported by the Council for Grants of the President of the Russian Federation (grant no. 15493GU/2020). The studies in this work were carried out on the equipment of the Center for Shared Equipment Use of the Ivanovo State University of Chemistry and Technology, Ivanovo, Russia.
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Translated by V. Glyanchenko
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Denisova, K.O., Il’in, A.A., Il’in, A.P. et al. Low-Temperature Catalytic Decomposition of N2O. Theor Found Chem Eng 56, 230–236 (2022). https://doi.org/10.1134/S0040579522010055
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DOI: https://doi.org/10.1134/S0040579522010055