The Importance of Bulk Ti3+ Defects in the Oxygen Chemistry on Titania Surfaces
| Autor: | Ralf Bechstein, Flemming Besenbacher, Stefan Wendt, Regine Streber, Yinying Wei, Jonas Ø. Hansen, Søren Porsgaard, Estephania Lira, Peipei Huo, Erik Lægsgaard |
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| Rok vydání: | 2011 |
| Předmět: |
Surface oxygen
Inorganic chemistry technology industry and agriculture Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Oxygen Catalysis 0104 chemical sciences law.invention Colloid and Surface Chemistry Adsorption chemistry Rutile law Desorption Scanning tunneling microscope 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of the American Chemical Society Lira, E, Wendt, S, Huo, P, Hansen, J Ø, Streber, R, Porsgaard, S, Wei, Y, Bechstein, R, Lægsgaard, E & Besenbacher, F 2011, ' The importance of bulk ti(3+) defects in the oxygen chemistry on titania surfaces ', Journal of the American Chemical Society, vol. 133, no. 17, pp. 6529-32 . https://doi.org/10.1021/ja200884w |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja200884w |
| Popis: | The role of bulk defects in the oxygen chemistry on reduced rutile TiO(2)(110)-(1 × 1) has been studied by means of temperature-programmed desorption spectroscopy and scanning tunneling microscopy measurements. Following O(2) adsorption at 130 K, the amount of O(2) desorbing at ∼410 K initially increased with increasing density of surface oxygen vacancies but decreased after further reduction of the TiO(2)(110) crystal. We explain these results by withdrawal of excess charge (Ti(3+)) from the TiO(2)(110) lattice to oxygen species on the surface and by a reaction of Ti interstitials with O adatoms upon heating. Important consequences for the understanding of the O(2)-TiO(2) interaction are discussed. |
| Databáze: | OpenAIRE |
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