Binding of oxygen with titanium dioxide on singlet potential energy surface: An ab initio investigation

Ab initio calculations have been carried out to investigate interaction of titanium dioxide TiO2 with oxygen O2 in ground triplet and excited singlet states. On a singlet potential energy surface (PES) formation of a stable compound of titanium peroxide TiO4 is revealed which should appear in reaction of TiO2 with singlet oxygen without activation barrier. This peroxide is lower in energy than the ground state of two individual molecules TiO2 + 3O2 by 34.6 kcal/mol. Location of conical intersection between triplet and singlet PESs of TiO2-O2 is also investigated.

Georgii A. Bogdanchikov and Alexey V. Baklanov

Chemical Physics Letters 2017, 667