Coadsorption of cesium and water on MgO(100)

The room temperature chemisorption of isotopically labelled water (H 2 18O) on clean and Cs-dosed MgO(100) surfaces has been investigated using secondary ion mass spectrometry (SIMS). Both clean and cesiated MgO surfaces show qualitative similarities in chemisorption behaviour, namely rapid dissocia...

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Bibliographic Details
Published in:Surface science 1992, Vol.271 (1), p.128-138
Main Authors: Karolewski, M.A., Cavell, R.G.
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:The room temperature chemisorption of isotopically labelled water (H 2 18O) on clean and Cs-dosed MgO(100) surfaces has been investigated using secondary ion mass spectrometry (SIMS). Both clean and cesiated MgO surfaces show qualitative similarities in chemisorption behaviour, namely rapid dissociative adsorption of H 2O with retention of liberated hydrogen at the surface as hydroxyl. Two adsorption regimes are identified, the first of these being completed after only 2 L of H 2O exposure. Addition of Cs to MgO(100) appears to increase the total surface H 2O uptake by 50–100% relative to clean MgO(100).
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(92)90867-6