Here's the bigger issue than efficiency, IMO: > during the first 6 hour cycle where the photoelectrode generated 0.18 μmol/cm2 of hydrogen And then... >Afte

Here's the bigger issue than efficiency, IMO: > during the first 6 hour cycle where the photoelectrode generated 0.18 μmol/cm2 of hydrogen And then... >After a further 6 hours illumination, the LaFeO3 thin film generated 0.08 μmol/cm2 of hydrogen (Figure S8). This provided additional evidence that the film is re-useable, although the amount of hydrogen produced is almost halved From 18 to 8 units/area in just six hours is not a good decay curve.