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- Title
A Refined Leed Analysis of Water on Ru{0001}: An Experimental Test of the Partial Dissociation Model.
- Authors
Puisto, S. R.; Lerotholi, T. J.; Held, G.; Menzel, D.
- Abstract
Despite a number of earlier studies which seemed to confirm molecular adsorption of water on close-packed surfaces of late transition metals, new controversy has arisen over a recent theoretical work by Feibelman, according to which partial dissociation occurs on the Ru{0001} surface leading to a mixed (H[sub 2] O + OH + H) superstructure. Here, we present a refined LEED-IV analysis of the [formula] structure, testing explicitly this new model by Feibelman. Our results favour the model proposed earlier by Held and Menzel assuming intact water molecules with almost coplanar oxygen atoms and out-of-plane hydrogen atoms atop the slightly higher oxygen atoms. The partially dissociated model with an almost identical arrangement of oxygen atoms can, however, not unambiguously be excluded, especially when the single hydrogen atoms are not present in the surface unit cell. In contrast to the earlier LEED-IV analysis, we can, however, clearly exclude a buckled geometry of oxygen atoms. [formula available in full text].
- Subjects
ADSORPTION (Chemistry); SURFACES (Physics); WATER
- Publication
Surface Review & Letters, 2003, Vol 10, Issue 2/3, p487
- ISSN
0218-625X
- Publication type
Article
- DOI
10.1142/S0218625X03005086