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Infrared spectra of catalysts and adsorbed molecules

Communication 15. Investigation of the formation of mixed nickel-titanium oxide catalysts

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Conclusions

  1. 1.

    The IR spectra of mixed hydroxides and oxides of nickel and titanium produced by coprecipitation with ammonia at constant pH from solutions of the nitrate, were studied.

  2. 2.

    The existence of structurally sensitive OH groups and water bonded by hydrogen and coordination bonds was demonstrated for the mixed hydroxides.

  3. 3.

    The aggregate of spectroscopic, thermogravimetric, and x-ray diffraction data indicates the formation of a nickel hydrotitanate phase at the stage of the mixed hydroxides.

  4. 4.

    Spectroscopic criteria of the formation of nickel titanate, formed in the calcination of mixed nickel and titanium hydroxides and characterized by octahedral coordination of titanium with respect to oxygen, are cited.

  5. 5.

    The possibility of the appearance of titanium compounds with a lower coordination of titanium with respect to oxygen than in nickel titanates is discussed.

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Literature cited

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Additional information

For communication 14, see [1].

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 1927–1933, September, 1971.

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Danyushevskii, V.Y., Lafer, L.I., Yakerson, V.I. et al. Infrared spectra of catalysts and adsorbed molecules. Russ Chem Bull 20, 1818–1822 (1971). https://doi.org/10.1007/BF00854397

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Keywords

  • Nitrate
  • Titanium
  • Nickel
  • Hydroxide
  • Calcination