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Oxygen adsorption on Pt(110)-(1×2): new high-coverage structures |
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| Authors: | S. Helveg H. T. Lorensen S. Horch E. L gsgaard I. Stensgaard K. W. Jacobsen J. K. N rskov F. Besenbacher |
| Affiliation: | a CAMP and Institute of Physics and Astronomy, University of Aarhus, DK 8000 Aarhus C, Denmark b CAMP and Physics Department, Technical University of Denmark, DK 2800 Lyngby, Denmark |
| Abstract: | From an interplay between scanning tunneling microscopy (STM) experiments and density functional theory (DFT) calculations, a comprehensive picture is obtained for oxygen adsorption on the Pt(110)-(1×2) surface, from single isolated oxygen atoms chemisorbed in FCC sites along the platinum ridges to the formation of a new high-coverage oxide-like structure with a local coverage of two oxygen atoms per platinum surface atom. We find that the repulsive O–O interactions for the O/Pt(110) system are compensated by an effective O–O attractive interaction originating from a strong coupling between oxygen adsorption and platinum lattice distortions. |
| Keywords: | Chemisorption Density functional theory calculations Oxygen Platinum Scanning tunneling microscopy Surface structure |
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