Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 18, Pages 4714-4716Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201309796
Keywords
adsorption; anatase; charge trapping; oxygen; surface chemistry
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Funding
- Austrian Science Fund (FWF)
- ERC
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A combination of photoemission, atomic force, and scanning tunneling microscopy/spectroscopy measurements shows that excess electrons in the TiO2 anatase (101) surface are trapped at step edges. Consequently, steps act as preferred adsorption sites for O-2. In density functional theory calculations electrons localize at clean step edges, this tendency is enhanced by O vacancies and hydroxylation. The results show the importance of defects for the wide-ranging applications of titania.
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