fig8
![Proton exchange membrane photoelectrochemical cell for water splitting under vapor feeding](https://image.oaes.cc/57de5165-b287-406e-aa25-345922893d8d/em4077.fig.8.jpg)
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: