fig8

Figure 8. Durability of anatase TiO₂ and SrTiO₃ photoanodes in vapor-fed PEC water splitting. (A) Photocurrent response (the numbers in the figure are the IPCE just before the light was turned off), (B) O₂ production rate, and (C) CO₂ production rate (wavelength: 365 nm, irradiance: 40 mW cm^-2, irradiation area: 16 cm², and applied voltage: 1.2 V vs. cathode). (D) SEM-EDS images of fluorine in the ionomer-coated SrTiO₃ photoanode before and after the PEC reaction. Reproduced from ref.^[13] with permission from the Royal Society of Chemistry.