Electrochemical rutile and anatase formation on PEO surfaces

Band alignment of rutile and anatase TiO2

The most widely used oxide for photocatalytic applications owing to its low cost and high activity is TiO2. The discovery of the photolysis of water on the surface of TiO2 in 19721 launched four decades of intensive research into the underlying chemical and physical processes involved2–5. Despite much collected evidence, a thoroughly convincing explanation of why mixed-phase samples of anatase ...

Electrochemical chlorine evolution at rutile oxide (110) surfaces.

Based on density functional theory (DFT) calculations we study the electrochemical chlorine evolution reaction on rutile (110) oxide surfaces. First we construct the Pourbaix surface diagram for IrO(2) and RuO(2), and from this we find the chlorine evolution reaction intermediates and identify the lowest overpotential at which all elementary reaction steps in the chlorine evolution reaction are...

EXAFS Study of Rutile and Anatase

T w o crystallographic forms of TiC>2 (rutile and anatase) were subject to a n extended x r a y absorption fine structure study a t the K threshold of t i tanium. D a t a analysis was carried out b y Fourier methods and curve fitting techniques. Using the theoretical phases, T i 0 bond distances of 1.93(1) A were derived both for ruti le and anatase, as compared to the crystallographic values o...

Influence of nitrogen doping on the defect formation and surface properties of TiO2 rutile and anatase.

Nitrogen doping-induced changes in the electronic properties, defect formation, and surface structure of TiO2 rutile(110) and anatase(101) single crystals were investigated. No band gap narrowing is observed, but N doping induces localized N 2p states within the band gap just above the valence band. N is present in a N(III) valence state, which facilitates the formation of oxygen vacancies and ...

Oxidative trends of TiO2—hole trapping at anatase and rutile surfaces