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Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)

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 TiO(2)(110) in ultrahigh vacuum condit...

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Autores principales: Hansen, Jonas Ø., Bebensee, Regine, Martinez, Umberto, Porsgaard, Soeren, Lira, Estephania, Wei, Yinying, Lammich, Lutz, Li, Zheshen, Idriss, Hicham, Besenbacher, Flemming, Hammer, Bjørk, Wendt, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4768110/
https://www.ncbi.nlm.nih.gov/pubmed/26915303
http://dx.doi.org/10.1038/srep21990
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author Hansen, Jonas Ø.
Bebensee, Regine
Martinez, Umberto
Porsgaard, Soeren
Lira, Estephania
Wei, Yinying
Lammich, Lutz
Li, Zheshen
Idriss, Hicham
Besenbacher, Flemming
Hammer, Bjørk
Wendt, Stefan
author_facet Hansen, Jonas Ø.
Bebensee, Regine
Martinez, Umberto
Porsgaard, Soeren
Lira, Estephania
Wei, Yinying
Lammich, Lutz
Li, Zheshen
Idriss, Hicham
Besenbacher, Flemming
Hammer, Bjørk
Wendt, Stefan
author_sort Hansen, Jonas Ø.
collection PubMed
description 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 TiO(2)(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 TiO(2).
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spelling pubmed-47681102016-03-02 Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110) Hansen, Jonas Ø. Bebensee, Regine Martinez, Umberto Porsgaard, Soeren Lira, Estephania Wei, Yinying Lammich, Lutz Li, Zheshen Idriss, Hicham Besenbacher, Flemming Hammer, Bjørk Wendt, Stefan Sci Rep Article 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 TiO(2)(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 TiO(2). Nature Publishing Group 2016-02-26 /pmc/articles/PMC4768110/ /pubmed/26915303 http://dx.doi.org/10.1038/srep21990 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. 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. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Hansen, Jonas Ø.
Bebensee, Regine
Martinez, Umberto
Porsgaard, Soeren
Lira, Estephania
Wei, Yinying
Lammich, Lutz
Li, Zheshen
Idriss, Hicham
Besenbacher, Flemming
Hammer, Bjørk
Wendt, Stefan
Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title_full Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title_fullStr Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title_full_unstemmed Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title_short Unravelling Site-Specific Photo-Reactions of Ethanol on Rutile TiO(2)(110)
title_sort unravelling site-specific photo-reactions of ethanol on rutile tio(2)(110)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4768110/
https://www.ncbi.nlm.nih.gov/pubmed/26915303
http://dx.doi.org/10.1038/srep21990
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