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Subsurface oxygen formation on the Pt(110) surface: experiment and mathematical modeling |
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| Authors: | A von Oertzen A Mikhailov H -H Rotermund G Ertl |
| Institution: | Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195, Berlin, Germany |
| Abstract: | Experiments using photo emission electron microscopy (PEEM) reveal that regions on a Pt(110) surface covered by chemisorbed O atoms may be converted into a subsurface O-phase, provided that it is preceded by the interaction of CO initiating the 1 × 2 → 1 × 1 transformation of the surface structure. However, the presence of subsurface oxygen also favors lifting of the surface reconstruction. A mathematical model of this process is developed using parameters derived from previous independent experiments and numerical simulations fitting new data to experimental findings. |
| Keywords: | Carbon monoxide Electron microscopy Low index single crystal surfaces Models of surface chemical reactions Models of surface kinetics Oxygen Platinum Surface diffusion |
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