About the degree of dissociation of admolecules on surfaces

About the degree of dissociation of admolecules on surfaces

The characteristics of the thermal desorption spectra obtained for isotopic exchange reactions have been related to the degrees of dissociation introduced on a phenomenological basis by Matsushima [Surf. Sci. 157 (1985) 297; 217 (1989) 155]. This formulation leads to an underdetermined system of equ...

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Veröffentlicht in:Surface science 1994-06, Vol.313 (1), p.107-119
Hauptverfasser: Sente, B., Dumont, Martine, Dufour, P., Dagonnier, R.
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Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
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container_end_page 119
container_issue 1
container_start_page 107
container_title Surface science
container_volume 313
creator Sente, B.
Dumont, Martine
Dufour, P.
Dagonnier, R.
description The characteristics of the thermal desorption spectra obtained for isotopic exchange reactions have been related to the degrees of dissociation introduced on a phenomenological basis by Matsushima [Surf. Sci. 157 (1985) 297; 217 (1989) 155]. This formulation leads to an underdetermined system of equations. Indispensable simplifications are analysed by means of kinetic models with one-site (or bridged) molecular adsorption precursor states. As a result, we tentatively propose an experimental test about the nature of these adsorption precursor states as well as subsequent experimental procedures to reach reliable values for the degrees of dissociation of the admolecules.
doi_str_mv 10.1016/0039-6028(94)91160-6
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subjects Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
title About the degree of dissociation of admolecules on surfaces
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