The adsorption of water on SrTiO 3 and TiO 2: a reappraisal
The adsorption of water on both SrTiO 3(100) and TiO 2(ll0) has been studied by He(ll) photoelectron spectroscopy and high resolution EELS. Water does not adsorb on the defect free surfaces at room temperature, although non-dissociative adsorption is observed on cooling SrTiOa to approximately 150 K. Dissociative adsorption of H 20 occurs at room temperature on TiO2 surfaces with defects introduced either by electron or argon-ion bombardment. By contrast, on argon-ion bombarded SrTiO3 dissociated and non-dissociated species coexist, although mild annealing under H20 leads to complete dissociation.
Spectrochimica Acta Part A: Molecular Spectroscopy
- Pub Date: