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Experimental evidence for mixed dissociative and molecular adsorption of water on a rutile TiO2(110) surface without oxygen vacancies
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 80, no 23, 235436- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2009. Vol. 80, no 23, 235436- p.
Keyword [en]
adsorption, dissociation, photoemission, synchrotron radiation, titanium compounds, water
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-138106DOI: 10.1103/PhysRevB.80.235436ISI: 000273228800132OAI: oai:DiVA.org:uu-138106DiVA: diva2:378910
Available from: 2010-12-16 Created: 2010-12-16 Last updated: 2017-12-11

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Sandell, Anders

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