Cobalt and manganese oxides and their complex oxide compositions were obtained by the sol-gel method using various precipitators(ammonia solution and HMTA). It was determined by X-ray diffraction method that both individual and co-precipitated hydroxo compounds after calcination at 400 °С form oxide phases of Co3O4 and Mn3O4 composition. Samples obtained by sedimentation with ammonia solution have a larger specific surface area than synthesized in HMTA solution. When calcined at 400 °C, the specific surface area for cobalt-containing samples sedimentated with ammonia solution decreases, and for samples sedimentated from HMTA solution - increases. The pore volume depends on the precipitator and changes little during calcination. For co-sedimentated and calcined at 400 °C samples, the specific surface area plays a significant role: the higher it is, the greater the catalytic ability of the sample to decompose hydrogen peroxide. On the SEM image of samples driedat 100 °C, sedimentated with ammonia solution, agglomeration of flat particles of gitrated oxides of cobalt and/or manganese of globular form is observed. For samples deposited in HMTA solution, SEM images are represented by agglomeration of particles in the form of planar layers. Calcination at 400 °C partially destroys the structure. Kinetic studies of the decomposition of hydrogen peroxide with the
participation of the obtained samples indicate the first order of the reaction. Samples of cobalt hydroxide and co-sedimentated cobalt and manganese hydroxy compounds synthesized in HMTA solution showed the best ability to catalyze. The highest productivity (dm3 H2O2 of decomposed 1 g of catalyst) is inherent in samples of cobalt hydroxy compounds and its composition with manganese compounds synthesized by HMTA, after heat treatment at 100 °C. The ability of such samples to catalytic decomposition of hydrogen peroxide is estimated to be not less than 2.4 dm3 H2O2 (14 days). Compared to compounds synthesized
with ammonia solution, they retain their activity for a longer time.
2. Kuznetsov B.N. Actual directions of catalytic processing of wood biomass. Abstracts. New catalytic processes for the deep processing of hydrocarbons and biomass. (Novosibirsk, 2017). P. 20. [in Russian]
3. Polezhaeva O.S., Dolgopolov E.A., Baranchikov A.E., Ivanov V.K., Tretyakov Yu.D. Synthesis of nanocrystalline solid solutions based on cerium dioxide doped with REE. Сondensed matter and interphases. 2010. 12 (2): 154.
4. Koshkin A.G., Lieberman E.Yu., Mikhailichenko A.I., Grunsky V.N. Catalytic activity of multicomponent cerium-containing systems based on VPYAN in CO + NO Uspekhi khimii i khimicheskoy tekhnologii (Advances in Chemistry and Chemical Technology). 2012. XXVI (8): 31. [in Russian]
5. Malyutin A.V., Lieberman E.Yu., Konkova T.V., Mikhailichenko A.I., Avetisov I.Kh. Synthesis and catalytic properties of a solid solution of Zr0.2Ce0.8O2 modified with rare earth metal oxides in the reaction of carbon monoxide detoxification. Uspekhi khimii i khimicheskoy tekhnologii (Advances in Chemistry and Chemical Technology). 2012. XXVI (8): 33. [in Russian]
6. Martínez-Arias A., Fernández-García M., Ballesteros V., Salamanca L.N., Conesa J.C., Otero C., Soria J. Characterization of High Surface Area Zr−Ce (1:1) Mixed Oxide Prepared by a Microemulsion Method. Langmuir. 1999. 15 (14): 4796.
7. Mashkovtsev M.A., Alikin E.A., Volkov A.S., Afanasyev A.S., Rychkov V.N. Synthesis and physico-chemical study of materials of composition Zr0.5Ce0.4Ln0.1Oх (where Ln = Y, La, Nd) as a component of automotive three-route catalysts. Fundamental’nyye issledovaniya (Fundamental research). 2013. 6: 895. [in Russian]
8. Prudius S.V., Sontsev V.M., Brei V.V. Hydroxyacetone oxidation with hydrogen peroxide over acid catalysts // Himia, Fizika ta Tehnologia Poverhni. 2015. 6 (4): 498; https://doi.org/10.15407/hftp06.04.498.
9. Yesmurzaeva N., Tursunova R., Selenova B., Kudaibergenov S. (). Low temperature oxidation of o-xylene with hydrogen peroxide in the presence of vanadium xerogels // Chemical Bulletin of Kazakh National University. 2017. 3: 26; http://doi.org/10.15328/cb813.
10. Tarana O.P., Ayusheev A.B., Ogorodnikova O.L., Prosvirin I.P., Isupova L.A. Perovskite- like catalysts LaBO3 (B = Cu, Fe, Mn, Co, Ni) for wet peroxide oxidation of
phenol // Journal of Siberian Federal University. Chemistry. 2013. 3 (6): 266.
11. Pat. US 006834494B2, F02K 9/68. Design and assembly of a catalyst bed gas generator for the catalytic decomposition of high concentration hydrogen peroxide propellants and the catalytic combustion of hydrocarbon/ air mixtures /Kevin A. Lohner, Jeffrey A. Mays, Kathleen M. Sevener; The Boeing Company, Chicago, IL; Filed: Apr. 1, 2003; Date of Patent: Dec.28,2004.
12. Denisova I.A., Gutenev V.V., Drovovozova T.I., Kondratova S.V. Heterogeneous and homogeneous catalysts for the decomposition of hydrogen peroxide and their application in water disinfection technologies // Izvestiya vuzov. Severo-kavkazskiy region. Tekhnicheskiye nauki (Proceedings of universities. North Caucasian region. Technical science). 2005. (3). 83. [in Russian].
13. Zaid B. Jildeh, Jan Oberländer, Patrick Kirchner, Patrick H. Wagner, Michael J. Schöning. Thermocatalytic Behavior of Manganese (IV) Oxide as Nanoporous Material on the Dissociation of a Gas Mixture Containing Hydrogen Peroxide // Nanomaterials. 2018. 8. 262. doi:10.3390/ nano8040262.
14. Shima Rahim Pouran, Abdul Aziz Abdul Raman, Wan Mohd Ashri Wan Daud. Reviewon the application of modified iron oxides as heterogeneous catalysts in Fenton reactions // Journal of Cleaner Production.2014. 64. 24. http://dx.doi.org/10.1016/j.jclepro.2013.09.013.
15. Pereira M.C., Oliveira L.C.A., Murad E.Iron oxide catalysts: Fenton and Fenton-like reactions - a review // Clay Minerals. 2012.47. 285. DOI: 0.1180/claymin.2012.047.3.0.
16. Khalida Akhtar, Naila Khalid, Murad Ali. Effect of pH and Temperature on the Catalytic Properties of Manganese dioxide // J.Chem.Soc.Pak. 2012. 34 (2). 263.
19. Shamb W., Setterfield C., Ventworth R. Hydrogen peroxide. Per. from English G.D. Vigdorovich. Ed. Doctor of Technical Sciences A.I. Gorbaneva. (Moscow: Publishing house of foreign lit., 1958). [in Russian].
20. Remi G. Inorganic chemistry course. T.2. Translation from German XI Edition. Ed. Corr. USSR Academy of Sciences A.V. Novosyolova.
(Moscow: Mir, 1966). [in Russian].
21. Ivanenko O.P, Pavlenko T.V, Pohorenko Yu.V., Omel’chuk A.O. Synthesis of complex oxide composition of cobalt-manganese and cerium-zirconium and their catalytic activity in the decomposition of hydrogen peroxide // Ukrainian Chemistry Journal. 2019. 85 (5). 15. [in Ukraine] https://doi. org/10.33609/0041-6045.85.11.2019.15-27.
22. Karnaukhov A.P. Adsorption. The texture of dispersed and porous materials. (Novosibirsk: Science, 1999) [in Russian].