Table 1. Reaction rates under direct sunlight excitation (UV flux = 0.25–0.35 mW/cm²) over 2 wt.% Au/TiO₂ (PBG-357 nm) photocatalyst in presence of 0.5 vol.% of ethanol.

Product	Reaction rate in mol/(gCatal.min)
Hydrogen	1.5–2 × 10−5
CO2	0.1–0.3 × 10−5
C2H4	ca. 1 × 10−7
CH3CHO	Traces (0.7 × 10−8)
CH4	Traces (0.4 × 10−8)