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Simulation of Thermal Desorption from Nanometer Catalyst Particles

Author

Listed:
  • V. P. Zhdanov

    (Department of Applied Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden;
    Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk 630090, Russia)

  • B. Kasemo

    (Department of Applied Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden)

Abstract

General equations are derived to describe monomolecular desorption from small supported catalyst particles in the cases where (i) the desorption process occurs simultaneously from different facets and (ii) adsorbed molecules are allowed to jump from the catalyst onto the support, diffuse on the support, and then desorb (a so-called spillover effect). Numerical calculations carried out on the basis of obtained equations indicate that the TPD spectra for interconnected facets might be qualitatively different from those for extended single crystals. The support-mediated channel has been shown to be important if the binding energy on the support is not too low.

Suggested Citation

  • V. P. Zhdanov & B. Kasemo, 1998. "Simulation of Thermal Desorption from Nanometer Catalyst Particles," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 5(02), pages 551-558.
  • Handle: RePEc:wsi:srlxxx:v:05:y:1998:i:02:n:s0218625x98000931
    DOI: 10.1142/S0218625X98000931
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