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Photoemission studies of water dissociation on rutile TiO2 (110): Aspects on experimental procedures and the influence of steps

Walle, Lars Erik; Ragazzon, Davide; Borg, Anne; Uvdal, Per LU and Sandell, Anders (2014) In Applied Surface Science 303. p.245-249
Abstract
composition of the first water layer on the stoichiometric rutile TiO2 (1 1 0) surface was studied with the use of synchrotron radiation photoelectron spectroscopy. The same H2O-OH balance was reached using different preparation procedures and there was no difference between H2O and D2O. On this basis, we rule out the possibility that the partially dissociated layer is an artifact caused by photon irradiation during measurements. Pre-deposition of Au at room temperature, primarily decorating step edges [e.g. S. A. Tenney et al. J. Phys. Chem. C 115 (2011) 11112] decreases the water uptake but does not relative amount that dissociates. This implies that the observed H2O-OH (b)alance is not controlled by dissociation at steps and subsequent... (More)
composition of the first water layer on the stoichiometric rutile TiO2 (1 1 0) surface was studied with the use of synchrotron radiation photoelectron spectroscopy. The same H2O-OH balance was reached using different preparation procedures and there was no difference between H2O and D2O. On this basis, we rule out the possibility that the partially dissociated layer is an artifact caused by photon irradiation during measurements. Pre-deposition of Au at room temperature, primarily decorating step edges [e.g. S. A. Tenney et al. J. Phys. Chem. C 115 (2011) 11112] decreases the water uptake but does not relative amount that dissociates. This implies that the observed H2O-OH (b)alance is not controlled by dissociation at steps and subsequent out-diffusion of hydrogens on the terraces. That is, the formation of a partially dissociated water layer is an inherent property of stoichiometric terraces. (C) 2014 Elsevier B. V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Titanium dioxide, Water, Adsorption, Photoelectron spectroscopy
in
Applied Surface Science
volume
303
pages
245 - 249
publisher
Elsevier
external identifiers
  • wos:000334293200034
  • scopus:84897976852
ISSN
1873-5584
DOI
10.1016/j.apsusc.2014.02.157
language
English
LU publication?
yes
id
588e81f8-e4e5-42eb-97f8-2b76be5db753 (old id 4482341)
date added to LUP
2014-06-19 13:52:07
date last changed
2017-01-01 03:25:47
@article{588e81f8-e4e5-42eb-97f8-2b76be5db753,
  abstract     = {composition of the first water layer on the stoichiometric rutile TiO2 (1 1 0) surface was studied with the use of synchrotron radiation photoelectron spectroscopy. The same H2O-OH balance was reached using different preparation procedures and there was no difference between H2O and D2O. On this basis, we rule out the possibility that the partially dissociated layer is an artifact caused by photon irradiation during measurements. Pre-deposition of Au at room temperature, primarily decorating step edges [e.g. S. A. Tenney et al. J. Phys. Chem. C 115 (2011) 11112] decreases the water uptake but does not relative amount that dissociates. This implies that the observed H2O-OH (b)alance is not controlled by dissociation at steps and subsequent out-diffusion of hydrogens on the terraces. That is, the formation of a partially dissociated water layer is an inherent property of stoichiometric terraces. (C) 2014 Elsevier B. V. All rights reserved.},
  author       = {Walle, Lars Erik and Ragazzon, Davide and Borg, Anne and Uvdal, Per and Sandell, Anders},
  issn         = {1873-5584},
  keyword      = {Titanium dioxide,Water,Adsorption,Photoelectron spectroscopy},
  language     = {eng},
  pages        = {245--249},
  publisher    = {Elsevier},
  series       = {Applied Surface Science},
  title        = {Photoemission studies of water dissociation on rutile TiO2 (110): Aspects on experimental procedures and the influence of steps},
  url          = {http://dx.doi.org/10.1016/j.apsusc.2014.02.157},
  volume       = {303},
  year         = {2014},
}