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The structure and activity of Ni-Cr2O3 and Ni-Cu-Cr2O3 catalysts

Communication 1. Phase analysis, texture, and their variation during the catalytic reaction

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  1. 1.

    Under the conditions of reduction studies, a substantial amount of the NiO phase remains in Ni-Cr2O3 catalysts, and does not disappear even during the dehydrogenation of cyclohexane on these catalysts. During the work there is an appreciable increase in the dimensions of the Ni crystals.

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    In coprecipitated oxides with the composition NiO-CuO-Cr2O3, at the temperature of calcination 600°, intensive formation of spinel NiCr2O4 is observed.

  3. 3.

    Reduced Ni-Cu-Cr2O3 catalysts contain a substantial amount of the NiO phase, the NiCr2O4 phase, and the Ni-Cu solid solution, and metallic nickel as well in the case of a larger nickel content.

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Literature cited

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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 691–697, April, 1971.

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Rubinshtein, A.M., Slinkin, A.A., Klyachko-Gurvich, A.L. et al. The structure and activity of Ni-Cr2O3 and Ni-Cu-Cr2O3 catalysts. Russ Chem Bull 20, 621–625 (1971).

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  • Oxide
  • Nickel
  • Solid Solution
  • Calcination
  • Cyclohexane