Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO2(110)
| Autor: | Flemming Besenbacher, Yinying Wei, Soeren Porsgaard, Bjørk Hammer, Umberto Martinez, Hicham Idriss, Lutz Lammich, Regine Bebensee, Stefan Wendt, Jonas Ø. Hansen, Estephania Lira, Zhongshan Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Multidisciplinary
Ethanol Materials science genetic structures 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption Chemical engineering chemistry Rutile Microscopy Step edges Dehydrogenation sense organs 0210 nano-technology Quantum tunnelling |
| Zdroj: | Hansen, J Ø, Bebensee, R, Martinez, U, Porsgaard, S, Salazar, E L, Wei, Y, Lammich, L, Li, Z, Idriss, H, Besenbacher, F, Hammer, B & Wendt, S 2016, ' Unravelling site-specific photo-reactions of ethanol on rutile TiO2(110) ', Scientific Reports, vol. 6 . https://doi.org/10.1038/srep21990 Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep21990 |
| Popis: | Finding the active sites of catalysts and photo-catalysts is crucial for an improved fundamental understanding and the development of efficient catalytic systems. Here we have studied the photo-activated dehydrogenation of ethanol on reduced and oxidized rutile TiO2(110) in ultrahigh vacuum conditions. Utilizing scanning tunnelling microscopy, various spectroscopic techniques and theoretical calculations we found that the photo-reaction proceeds most efficiently when the reactants are adsorbed on regular Ti surface sites, whereas species that are strongly adsorbed at surface defects such as O vacancies and step edges show little reaction under reducing conditions. We propose that regular Ti surface sites are the most active sites in photo-reactions on TiO2. |
| Databáze: | OpenAIRE |
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