Figure 5

Radiolysis schemes, (a) corresponding to the production of gaseous N2 (pyridine partial pressure of 0.1 mbar) and (b) to the production of adsorbed CO2 (pyridine partial pressure of 0.3 mbar and 0.5 mbar). eph and eAuger are photoelectrons and Auger electrons, respectively, produced under X-ray irradiation (hν). e and h are valence electrons and holes, respectively, created as eph and eAuger lose energy in the oxide. \(\overrightarrow{E}\) is the electric field.