An ab initio analysis of adsorption and diffusion of silver atoms on partially hydroxylated α-Al2O3(0 0 0 1) surfaces

Randall Meyer, John Lockemeyer, Randall Yeates, Michael Lemanski, Donald Reinalda, Matthew Neurock

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12 Scopus citations

Abstract

The adsorption and diffusion of silver adatoms is examined over different partially hydroxylated model α-Al2O3(0 0 0 1) surfaces created by combinations of quadrants of the two stable phases, a fully hydroxylated surface and the Al-terminated surface. While the model shows relatively weak adsorption which leads to low activation barriers for diffusion, it does not fully capture the behavior observed in XPS experiments by Kelber et al. which report a stronger interaction with the support and an increase in the diffusion barrier when partially hydroxylated surfaces are created. It is suggested that some as of yet uncharacterized defects must be responsible for the observed behavior.

Original languageEnglish (US)
Pages (from-to)155-159
Number of pages5
JournalChemical Physics Letters
Volume449
Issue number1-3
DOIs
StatePublished - Nov 26 2007

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