The adsorption of O2 on the TiN(001) stepped surface and the consequent formation of surface oxide have been characterized using first-principles calculations. The adsorption and dissociation of O2 on both the flat and the stepped surface are predicted to be spontaneous. Compared with the flat surface, however, the dissociation of O2 on the stepped surface is predicted to be more exothermic. A formation mechanism for TiO2 at the step is proposed that includes a nitrogen exit channel that enables further oxidation.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films