Adsorption and bonding of 2-butenal on Sn/Pt surface alloys
Autor: | E. Janin, Mats Göthelid, S. Ringler, Jonas Weissenrieder, T. Åkermark, H. von Schenck |
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Rok vydání: | 2003 |
Předmět: | |
Zdroj: | Journal of Catalysis. 215:245-253 |
ISSN: | 0021-9517 |
DOI: | 10.1016/s0021-9517(03)00016-2 |
Popis: | The adsorption of 2-butenal on the Pt(111), Pt(111)Sn-(2 x 2), and Pt(111)Sn-(root3 x root3)R30degrees surfaces has been studied by high-resolution photoelectron spectroscopy and DFT calculations. On Pt(111) 2-butenal adsorbs at a threefold hollow in a eta(3)(C,C,O) configuration. A similar geometry is observed for Pt(111)Sn-(2 x 2), although the oxygen coordinates to tin instead of platinum. As the surface coverage of tin increases, as for Pt(111)Sn-(root3 x root3)R30degrees, the most stable adsorption geometry changes to eta(1)(O), where the carbonyl oxygen once again coordinates to tin. The carbonyl bond thus retains an activated character as Pt/Sn alloys are formed. The alkene/surface interaction is, however, dramatically influenced at increasing surface concentrations of tin. |
Databáze: | OpenAIRE |
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