Laser-Induced Desorption Determinations of Surface Diffusion on Rh(111)

  • E. G. Seebauer
  • L. D. Schmidt
Conference paper
Part of the Springer Series in Surface Sciences book series (SSSUR, volume 12)

Abstract

Surface diffusion of hydrogen, deuterium and CO on Rh(111) has been investigated by laser-induced thermal desorption (LITD) and compared with previous results for these species on Pt(111) and on other metals. For deuterium in the coverage range 0.02 < θ < 0.33, the pre-exponential factor D0 = 8 × 10−2 cm2/s, with a diffusion activation energy 3.7 < Ediff < 4.3 kcal/mol. For CO, Ediff = 7 kcal/mol, but D0 rises from 10−3 to 10−2 cm2/s between θ = 0.01 and 0.40.

Keywords

Migration Catalysis Deuterium 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • E. G. Seebauer
    • 1
  • L. D. Schmidt
    • 2
  1. 1.Laser and Atomic Physics DivisonSandia National LaboratoriesAlbuquerqueUSA
  2. 2.Department of Chemical Engineering and Materials ScienceUniversity of IllinoisUrbanaUSA

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