Kinetics and Catalysis

, Volume 41, Issue 1, pp 71–75 | Cite as

Spatial distributions of desorption flow as an indicator for a precursor state in several systems

  • M. U. Kislyuk
  • V. V. Savkin
  • I. I. Tret’yakov
Article
Received:

Abstract

Spatial distributions of the desorption flow (SDDF) of CH4, N2 and azomethane (CH3N=NCH3) on molybdenum, O2 and N2 on indium, and N2 on iron were measured by TPD/TPR with angular resolution and described by the Comsa equation. The activation energy of chemisorption and the effect of the precursor state on the total desorption rate were estimated from the parameters of the Comsa equation. The pathway via a precursor state is the main one (60–90%) for oxygen on indium and for nitrogen and azomethane on molybdenum. For other systems, this pathway cannot be completely excluded either. According to our upper estimates, its contribution can be essential (∼40%).

Keywords

Iridium Comsa Model Precursor State Dissociative Chemisorption Azomethane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Kisliuk, P.J.,J. Phys. Chem. Solids, 1957, vol. 3, no. 1, p. 95.CrossRefGoogle Scholar
  2. 2.
    King, D.A.,Chemistry and Physics of Solid Surfaces, Wanselow, R., Ed., Boca Raton: CRC, 1979, vol. 2, p. 87.Google Scholar
  3. 3.
    Thomas, J.M. and Thomas, W.J.,Introduction to the Principles of Hetergeneous Catalysis, London: Academic, 1967.Google Scholar
  4. 4.
    Van Willigen, V.,Phys. Lett. A, 1968, vol. 28, no. 2, p. 80.CrossRefGoogle Scholar
  5. 5.
    Comsa, G. and David, R.,Chem. Phys. Lett, 1977, vol. 49, no. 3, p. 512.CrossRefGoogle Scholar
  6. 6.
    Savkin, V.V., Kislyuk, M.U., and Sklyarov, A.V.,Kinet. Katal., 1987, vol. 28, no. 1, p. 1409.Google Scholar
  7. 7.
    Kislyuk, M.U., Tret’yakov, I.I., Savkin, V.V., and Sinev, M.Yu.,Kinet. Katal., 2000, vol. 41, no. 1, p. 71.CrossRefGoogle Scholar
  8. 8.
    Redhead, P.A.,Vacuum, 1962, vol. 12, no. 1, p. 203.CrossRefGoogle Scholar
  9. 9.
    Savkin, V.V. and Kislyuk, M.U.,Kinet. Katal., 1996, vol. 37, no. 4, p. 591.Google Scholar
  10. 10.
    Kislyuk, M.U. and Bakuleva, T.N.,Izv. Akad. Nauk SSSR, Ser. Khim., 1990, no. 6, p. 2699.Google Scholar
  11. 11.
    Kislyuk, M.U., Migulin, V.V., and Savkin, V.V.,Izv. Akad. Nauk SSSR, Ser. Khim., 1994, no. 6, p. 999.Google Scholar

Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • M. U. Kislyuk
    • 1
  • V. V. Savkin
    • 1
  • I. I. Tret’yakov
    • 1
  1. 1.Semenov Institute of Chemical PhysicsRussian Academy of SciencesMoscowRussia

Personalised recommendations