Fig. 3

In situ NAP-XPS spectra of C1s a and O1s b signals recorded for Ag/TiO2 under the following conditions (from bottom to top): UHV; after dosing CO2 and H2O (PCO2 = 4.375 × 10−2mbar and PH2O 6.250 × 10−3mbar; PTotal = 5 × 10−2mbar); and subsequently exposed to UV irradiation (365 nm)