Kinetics and Catalysis

, Volume 59, Issue 2, pp 160–173 | Cite as

Mechanochemical Activation of Cu–CeO2 Mixture as a Promising Technique for the Solid-State Synthesis of Catalysts for the Selective Oxidation of CO in the Presence of H2

  • A. A. FirsovaEmail author
  • O. S. Morozova
  • G. A. Vorob’eva
  • A. V. Leonov
  • A. I. Kukharenko
  • S. O. Cholakh
  • E. Z. Kurmaev
  • V. N. Korchak


A new ecologically clean method for the solid-phase synthesis of oxide copper–ceria catalysts with the use of the mechanochemical activation of a mixture of Cu powder (8 wt %) with CeO2 was developed. It was established that metallic copper was oxidized by oxygen from CeO2 in the course of mechanochemical activation. The intensity of a signal due to metallic Cu in the X-ray diffraction analysis spectra decreased with the duration of mechanochemical activation. The Cu1+, Cu2+, and Ce3+ ions were detected on the sample surface by X-ray photoelectron spectroscopy. The application of temperature-programmed reduction (TPR) made it possible to detect two active oxygen species in the reaction of CO oxidation in the regions of 190 and 210–220°C by a TPR-H2 method and in the regions of 150 and 180–190°C by a TPR-CO method. It is likely that the former species occurred in the catalytically active nanocomposite surface structures containing Cu–O–Ce bonds, whereas the latter occurred in the finely dispersed particles of CuO on the surface of CeO2. The maximum conversion of CO (98%, 165°C) reached by the mechanochemical activation of the sample for 60 min was almost the same as conversion on a supported CuO/CeO2 catalyst.


solid-phase synthesis mechanochemical activation oxide copper–cerium catalysts selective oxidation of CO in the presence of H2 


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. A. Firsova
    • 1
    Email author
  • O. S. Morozova
    • 1
  • G. A. Vorob’eva
    • 1
  • A. V. Leonov
    • 2
  • A. I. Kukharenko
    • 3
    • 4
  • S. O. Cholakh
    • 4
  • E. Z. Kurmaev
    • 3
    • 4
  • V. N. Korchak
    • 1
  1. 1.Semenov Institute of Chemical PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.Department of ChemistryMoscow State UniversityMoscowRussia
  3. 3.Mikheev Institute of Metal Physics, Ural BranchRussian Academy of SciencesYekaterinburgRussia
  4. 4.Institute of Physics and TechnologyUral Federal UniversityYekaterinburgRussia

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