Abstract—
This paper presents a comparative study of the catalytic properties of the ZnMn2O4 and ZnMnO3 manganites for carbon oxidation. The manganites have been prepared by a sol–gel process using reaction mixtures with different ratios of the constituent oxides. The particles of the two manganites were comparable in size (200–500 nm) and specific surface area (34–42 m2/g) and ensured similar behaviors of the catalytic reaction in the temperature range 260–470°C. The catalytic activity of the perovskite phase ZnMnO3 can be accounted for by the high absolute oxygen nonstoichiometry, δ = 0.29, as determined by iodometry. Contact interaction between spinel ZnMn2O4 and carbon leads to the reduction of Mn3+ to Mn2+ and is accompanied by Mn3O4 formation. The change in the relationship between the constituent oxides in the surface layer of the ZnMn2O4 particles leads to the formation of the active perovskite phase ZnMnO3, which initiates catalytic reaction.
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REFERENCES
Gusko, N., Zolnierkiewicz, G., Typek, J., Sibera, D., Narkiewicz, U., and Lojkowski, W., Magnetic resonance study of MnO/ZnO nanopowders, Acta Phys. Pol., A, 2011, vol. 120, no. 6, pp. 1074–1079.
Labhsetwar, N.K., Biniwale, R.B., Kumar, R., Bawase, M.A., Rayalu, S.S., Mitsuhashi, T., and Haneda, H., Application of catalytic materials for diesel exhaust emission control, Curr. Sci., 2004, vol. 87, no. 12, pp. 1700–1704.
Gong, C., Song, Ch., Pei, Y., Lv, G., and Fan, G., Synthesis of La0.9K0.1CoO3 fibers and the catalytic properties for diesel soot removal, Ind. Eng. Chem. Res., 2008, vol. 47, pp. 4374–4378.
Russo, N., Fino, D., Saracco, G., and Specchia, V., Studies on the redox properties of chromite perovskite catalysts for soot combustion, J. Catal., 2005, vol. 229, pp. 459–469.
Tofan, C., Klvana, D., and Kirchnerova, J., Direct decomposition of nitric oxide over perovskite-type catalysts. Part I. Activity when no oxygen is added to the feed, Appl. Catal., A, 2002, vol. 223, pp. 275–286.
Oishi, M., Yashiro, K., Sato, K., Mizusaki, J., and Kawada, T., Oxygen nonstoichiometry and defect structure analysis of B-site mixed perovskite-type oxide (La,Sr)(Cr,M)O3 – d (M = Ti, Mn and Fe), J. Solid State Chem., 2008, vol. 181, pp. 3177–3184.
Ferraris, G., Fierro, G., Jacono, M.L., Inversi, M., and Dragone, R., A study of the catalytic activity of cobalt–zinc manganites for the reduction of NO by hydrocarbons, Appl. Catal., B, 2002, vol. 36, pp. 251–260.
Ferraris, G., Fierro, G., Jacono, M.L., Inversi, M., and Dragone, R., Catalytic activity of copper–zinc manganites for the reduction of NO and N2O by hydrocarbons, Appl. Catal., B, 2003, vol. 57, pp. 153–165.
Fierro, G., Jacono, M.L., Dragone, R., Ferraris, G., Andreozzi, G.B., and Graziani, G., Fe–Zn manganite spinels and their carbonate precursors: preparation, characterization and catalytic activity, Appl. Catal., B, 2005, vol. 57, pp. 153–165.
Shetkar, R.G. and Salker, A.V., Solid state and catalytic CO oxidation studies on Zn1 – xNixMnO3 system, Mater. Chem. Phys., 2008, vol. 108, nos. 2–3, pp. 435–439.
Dubinin, S.F., Loshkareva, N.N., Teploukhov, S.G., Sukhorukov, Yu.P., Balbashov, A.M., Arkhipov, V.E., and Parkhomenko, V.D., Ordering of oxygen vacancies in a CaMnO3 – δ perovskite single crystal, Phys. Solid State, 2005, vol. 47, no. 7, pp. 1267–1272.
Pena, M.A. and Fierro, J.L.G., Chemical structures and performance of perovskite oxides, Chem. Rev., 2001, vol. 101, pp. 1981–2017.
Anderson, M.T., Vaughey, J.T., and Poeppelmeier, K.R., Structural similarities among oxygen-deficient perovskites, Chem. Mater., 1993, vol. 5, pp. 151–165.
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Chigrin, P.G., Kirichenko, E.A. Catalytic Properties of Zinc Manganites for Carbon Oxidation. Inorg Mater 54, 1131–1135 (2018). https://doi.org/10.1134/S0020168518110043
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DOI: https://doi.org/10.1134/S0020168518110043