Analysis of thermal desorption data

Using a nonequilibrium thermodynamic approach, we calculate temperature programmed desorption curves and analyse them with isosteric Arrhenius plots. For desorption from a two-phase adsorbate, we produce double-valued desorption energies and prefactors exhibiting a compensation effect. We introduce...

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Bibliographic Details
Published in:Surface science 1989-11, Vol.222 (2), p.404-429
Main Authors: Payne, S.H., Kreuzer, H.J.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-gas interface
Surface physical chemistry
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Summary:Using a nonequilibrium thermodynamic approach, we calculate temperature programmed desorption curves and analyse them with isosteric Arrhenius plots. For desorption from a two-phase adsorbate, we produce double-valued desorption energies and prefactors exhibiting a compensation effect. We introduce a differential desorption energy to understand temperature averaging and to describe nonequilibrium effects. Our results delineate, in part, the validity of an Arrhenius-type analysis.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(89)90369-5