CO-induced restructuring of Pt(110)-(1×2): Bridging the pressure gap with high-pressure scanning tunneling microscopy
| Autor: | E. Kruse Vestergaard, T. An, E. Lægsgaard, P. Thostrup, Flemming Besenbacher |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Surface diffusion
Chemistry Binding energy Scanning tunneling spectroscopy General Physics and Astronomy Spin polarized scanning tunneling microscopy Electrochemical scanning tunneling microscope law.invention Crystallography law Chemical physics Orders of magnitude (data) Physical and Theoretical Chemistry Scanning tunneling microscope Surface reconstruction |
| Zdroj: | The Journal of Chemical Physics. 118:3724-3730 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1540611 |
| Popis: | We present an extensive investigation of CO-induced structural transformations occurring on the reconstructed Pt(110)-(1×2) surface while bridging the so-called pressure gap between surface science and industrial catalysis. The structural changes are followed on the atomic scale as a function of CO pressure over 12 orders of magnitude, up to 1 bar, by the use of a novel high-pressure scanning tunneling microscope (HP-STM). The transition between the low-coverage and saturation-coverage structures is found to proceed through local displacements of substrate Pt atoms. The structural transformations of the Pt surface as observed by STM can be explained within a very simple picture governed by the gain in CO binding energy when CO binds to low-coordinated metal atoms. |
| Databáze: | OpenAIRE |
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