Non-Adiabatic Processes in Field Desorption Phenomena

  • N. Shima
  • M. Tsukada
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 59)

Abstract

The field-induced desorption phenomenon [1] of surface atoms or adsorbed molecules gives direct information about the microscopic states of surface atoms. Recently qualitatively different behaviors were found between strongly adsorbed (chemisorbed) and weakly adsorbed (physisorbed) hydrogen-metal surface systems when the high electric field was applied. In the strongly adsorbed systems of hydrogen on Fe or Ni, H+ ions were detected [2]. On the other hand, in the weakly adsorbed systems of hydrogen on A1 or Cu, dominant desorbed species are metal hydride ions and the proportion of the desorbed H+ is small. Such behavior is puzzling from the usual view points of the chemical reaction, since the weaker bond might be considered harder to dissociate.

Keywords

Hydride 

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References

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    O. Nishikawa, T. Yoshimura, M. Shibata:(unpublished)Google Scholar
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    R. Gomer, L. W. Swanson: J. Chem. Phys. 38, 1613 (1963)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • N. Shima
    • 1
  • M. Tsukada
    • 1
  1. 1.Department of PhysicsUniversity of TokyoBunkyo-ku, Tokyo 113Japan

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