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Experimental evidence for mixed dissociative and molecular adsorption of water on a rutile TiO2(110) surface without oxygen vacancies

Walle, L. E. ; Borg, A. ; Uvdal, Per LU and Sandell, A. (2009) In Physical Review B (Condensed Matter and Materials Physics) 80(23).
Abstract
We present evidence for mixed molecular and dissociative water adsorption at monolayer coverage on a rutile TiO2(110) surface free from oxygen vacancies using synchrotron radiation photoemission. At monolayer coverage the OH:H2O ratio is close to 0.5 and reducing the coverage by heating yields an increased OH:H2O ratio. At room temperature neither species originating from the monolayer on the defect-free surface can be detected. The OH species of the monolayer hence recombines and leaves the surface at much lower temperatures than OH formed by water dissociation on oxygen vacancies.
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
synchrotron radiation, photoemission, adsorption, dissociation, titanium compounds, water
in
Physical Review B (Condensed Matter and Materials Physics)
volume
80
issue
23
publisher
American Physical Society
external identifiers
  • wos:000273228800132
  • scopus:77954747231
ISSN
1098-0121
DOI
10.1103/PhysRevB.80.235436
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
id
e88e5b2a-2898-4b20-935d-4f57197af5ba (old id 1531521)
date added to LUP
2016-04-01 14:26:03
date last changed
2020-12-08 04:16:04
@article{e88e5b2a-2898-4b20-935d-4f57197af5ba,
  abstract     = {We present evidence for mixed molecular and dissociative water adsorption at monolayer coverage on a rutile TiO2(110) surface free from oxygen vacancies using synchrotron radiation photoemission. At monolayer coverage the OH:H2O ratio is close to 0.5 and reducing the coverage by heating yields an increased OH:H2O ratio. At room temperature neither species originating from the monolayer on the defect-free surface can be detected. The OH species of the monolayer hence recombines and leaves the surface at much lower temperatures than OH formed by water dissociation on oxygen vacancies.},
  author       = {Walle, L. E. and Borg, A. and Uvdal, Per and Sandell, A.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {23},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Experimental evidence for mixed dissociative and molecular adsorption of water on a rutile TiO2(110) surface without oxygen vacancies},
  url          = {http://dx.doi.org/10.1103/PhysRevB.80.235436},
  doi          = {10.1103/PhysRevB.80.235436},
  volume       = {80},
  year         = {2009},
}