Table 2.

Comparison of the produced amount of hydrogen and the respective photocatalytic activities normalized to the evolution of hydrogen per area and time.

Sample	Total H2 Volume (mL)	H2 evolution Rate a (µL h−1 cm−2)	H2 evolution Rate b (μmol h−1 cm−2)
pure TiO2	5.0	31	1.3
photodeposited Au-TiO2	44.1	372	15.2
plasma-deposited Au-TiO2	20.0	152	6.2
plasma-deposited Ag/Au-TiO2	28.2	217	8.9

^a calculated as an average over 17 h, starting after the first hour. ^b calculated by applying the van der Waals equation at 25 °C, which yields a molar volume of 24.48 μL/μmol.