CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeOx Film on Pt(111)
| Autor: | Hendrik Bluhm, Jan Knudsen, Miquel Salmeron, Lars C. Grabow, Lindsay R. Merte, Erik Lægsgaard, Helene Zeuthen, Flemming Besenbacher, Falk M. Eichhorn, Manos Mavrikakis, Soeren Porsgaard |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Chemistry
Substrate surface Analytical chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Catalysis 0104 chemical sciences law.invention Colloid and Surface Chemistry X-ray photoelectron spectroscopy law Torr Density functional theory Thin film Scanning tunneling microscope 0210 nano-technology Adsorption energy |
| Zdroj: | Journal of the American Chemical Society Merte, L R, Knudsen, J, Eichhorn, F M, Porsgaard, S, Zeuthen, H, Grabow, L, Lægsgaard, E, Bluhm, H, Salmeron, M, Mavrikakis, M & Besenbacher, F 2011, ' CO-Induced Embedding of Pt Adatoms in a Partially Reduced FeO(x) Film on Pt(111) ', Journal of the American Chemical Society . https://doi.org/10.1021/ja2015923 |
| ISSN: | 0002-7863 |
| DOI: | 10.1021/ja2015923 |
| Popis: | The reduction of a single-layer FeO film grown on Pt(111) by CO at elevated pressures and temperatures has been studied through an interplay of scanning tunneling microscopy, ambient-pressure X-ray photoelectron spectroscopy, and density functional theory calculations. Exposure of the FeO thin film to CO at pressures between 1 and 30 Torr and temperatures between 500 and 530 K leads to formation of a honeycomb-structured Fe(3)O(2) film with hollow sites occupied by single Pt atoms extracted from the substrate surface. The formation of these adatoms is driven by an increase in CO adsorption energy. In addition, the structure incorporates undercoordinated Fe centers, which are proposed to have substantial effects on the catalytic properties of the surface. |
| Databáze: | OpenAIRE |
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