Journal
PHYSICAL REVIEW B
Volume 80, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.235436
Keywords
adsorption; dissociation; photoemission; synchrotron radiation; titanium compounds; water
Funding
- Swedish Science Council
- Knut and Alice Wallenberg foundation (KAW)
- NordForsk foundation
- Crafoord foundation
- Strategic Area Materials at NTNU
- Research Council of Norway [138368/V30]
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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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