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Título: | Adsorption and nonadiabatic processes in the photodesorption of molecular oxygen from the reduced TiO2(110) surface |
Autor: | Lara Castells, María Pilar de CSIC ORCID ; Mitrushchenkov, Alexander O.; Roncero, Octavio CSIC ORCID ; Krause, Jeffrey L. | Fecha de publicación: | 2005 | Editor: | Wiley-VCH | Citación: | Israel Journal of Chemistry 45: 59- 76 (2005) | Resumen: | We review the adsorption and desorption of molecular oxygen on a reduced TiO2 (110) surface. This system is known to play a fundamental role in heterogeneous photocatalysis. Periodic calculations are performed with the objective of characterizing the variety of stable species of O-2 that are known to exist on the TiO2 surface. The implications of our results for recent experiments are discussed. We also consider a direct optical excitation mechanism for the ultraviolet (UV) light-desorption process and model the most stable O-2/TiO2-x system as a cluster. Hi-h-level ab initio calculations of the excited states and interaction matrix elements are performed using different orbitals, separately optimized for the target states. The nonadiabatic and dipole-moment couplings are calculated directly from the correlated wave functions by a special transformation to bi-orthonormat (dual) orbital sets to preserve their structure. The method used for the electronic structure calculations is described in detail. Finally, the effect of the electronic coupling in the UV-photodesorption dynamics is analyzed in detail. | URI: | http://hdl.handle.net/10261/71019 | DOI: | 10.1560/M5CA-Y86N-FL5L-WNQ7 | Identificadores: | doi: 10.1560/M5CA-Y86N-FL5L-WNQ7 issn: 0021-2148 |
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