Journal of Thermal Analysis and Calorimetry

, Volume 134, Issue 1, pp 355–361 | Cite as

Obtaining and catalytic properties investigation of the products of double-complex salts [Cr(ur)6][M(L)6] thermal oxidation (M = Co, Fe; L = CN, 1/2C2O 4 2− )

  • Evgeny Yu Filatov
  • Yulya P. Semushina
  • Alevtina N. Gosteva


The thermal behavior of double-complex salts [Cr(ur)6][Fe(CN)6]·4H2O (I), [Cr(ur)6][Co(CN)6]·4H2O (II), [Cr(ur)6][Fe(C2O4)3]·2H2O (III), [Cr(ur)6][Co(C2O4)3]·3.5H2O (IV) was studied (ur = urea, H2NCONH2). Thermal decomposition was carried out by the method of static experiments in an oxidizing (air) atmosphere at a 1-h exposure. The products of thermolysis were characterized by the X-ray diffraction method. The porous structure and the specific surface of the samples were determined. For Cr–Co systems at temperatures above 600 °C, the formation of a single-phase spinel of the composition Co1.5Cr1.5O4 was recorded, whereas for the Cr–Fe systems the formation of a mixed oxide phase (Fe,Cr)2O3 occurred with heating up to 900 °C. It was shown that in all cases, as the temperature increased, the specific surface area decreased and the calculated particle size of the oxidation products increased. Thermolysis products were investigated in the model reaction of catalytic oxidation of acetone with air oxygen. The obtained values of the rate constants of the reaction show that the replacement of Fe with Co does not significantly affect the catalytic activity of the products, and only an increase in the temperature of thermolysis leads to a certain decrease in the catalytic activity.


Thermal decomposition Double-complex salt Cyanocomplexes Spinel Catalytic oxidation 



This work was supported by U.M.N.I.K. Grant No: 11220GY/2016 and partially by the RFBR Grant 17-03-950-a (E.Yu. Filatov) in the part of samples characterization.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Evgeny Yu Filatov
    • 1
    • 2
  • Yulya P. Semushina
    • 3
  • Alevtina N. Gosteva
    • 3
  1. 1.Nikolaev Institute of Inorganic Chemistry SB RASNovosibirskRussia
  2. 2.Novosibirsk State UniversityNovosibirskRussia
  3. 3.Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, KSC RASApatityRussia

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