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Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO2(110)

Hansen, JØ; Bebensee, R; Martinez, U; Porsgaard, S; Lira, E; Wei, Y; Lammich, L; ... Wendt, S; + view all (2016) Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO2(110). Scientific Reports , 6 , Article 21990. 10.1038/srep21990. Green open access

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Abstract

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.

Type: Article
Title: Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO2(110)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/srep21990
Publisher version: http://dx.doi.org/10.1038/srep21990
Language: English
Additional information: Copyright © The authors 2016. This work is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1507784
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