Table 2. Photocatalytic performance of DSP systems studied in this work a .
| System | TOFcat f /h–1 | TOFdye g /h–1 | n(H2)/μmol (1 h) | TONcat f | TONdye g |
| Dye|TiO 2 | CoP b | |||||
| DPP2 | 8.8 ± 0.9 | 17.5 ± 1.8 | 0.43 ± 0.04 | 17.2 ± 1.7 (3 h) | 34.4 ± 3.4 (3 h) |
| RuP | 28.4 ± 3.4 | 56.8 ± 6.9 | 1.42 ± 0.17 | 48.4 ± 4.8 (3 h) | 96.7 ± 10.0 (3 h) |
| Dye|TiO 2 | NiP c | |||||
| DPP1 | 14.7 ± 1.5 | 14.7 ± 1.5 | 0.38 ± 0.04 | 96.8 ± 9.7 (21 h) | 96.8 ± 9.7 (21 h) |
| DPP2 | 34.6 ± 3.5 | 34.6 ± 3.5 | 0.86 ± 0.09 | 204.6 ± 20.5 (21 h) | 204.6 ± 20.5 (21 h) |
| DPP3 | 15.5 ± 1.6 | 15.5 ± 1.6 | 0.39 ± 0.04 | 131.1 ± 13.1 (21 h) | 131.1 ± 13.1 (21 h) |
| DPP4 | 10.0 ± 1.0 | 10.0 ± 1.0 | 0.25 ± 0.03 | 126.3 ± 12.6 (21 h) | 126.3 ± 12.6 (21 h) |
| DPP5 | 26.4 ± 2.6 | 26.4 ± 2.6 | 0.66 ± 0.07 | 192.4 ± 19.2 (21 h) | 192.4 ± 19.2 (21 h) |
| RuP | 54.3 ± 5.4 | 54.3 ± 5.4 | 1.35 ± 0.14 | 233.6 ± 23.4 (21 h) | 233.6 ± 23.4 (21 h) |
| Dye|TiO 2 |H 2 ase d | |||||
| DPP2 | 8650 ± 1100 | 17.3 ± 2.2 | 0.43 ± 0.06 | 87 600 ± 11 100 (21 h) | 175 ± 22 (21 h) |
| RuP | 12 500 ± 1246 | 25.0 ± 2.5 | 0.62 ± 0.06 | 91 100 ± 22 300 (21 h) | 182 ± 45 (21 h) |
| Dye|TiO 2 |Pt e | |||||
| DPP2 | n.d. h | 337 ± 33.7 | 8.4 ± 0.8 | n.d. h | 2660 ± 265 (24 h) |
| RuP | n.d. h | 71.3 ± 7.1 | 1.8 ± 0.2 | n.d. h | 431 ± 95 (24 h) |
aGeneral conditions: samples contained dye and catalyst loaded onto P25 TiO2 nanoparticles (2.5 mg) in a total volume of 3 mL of SED solution and were irradiated with UV-filtered simulated solar light (100 mW cm–2, AM 1.5G, λ > 420 nm) at 25 °C.
b CoP (0.05 μmol) and dye (0.05 μmol) on TiO2 in aqueous TEOA solution (3 mL, pH 7, 0.1 M), see Table S5 for results for DPP1, DPP3, DPP4 and DPP5.
c NiP (0.025 μmol) and dye (0.05 μmol) on TiO2 in aqueous AA solution (3 mL, pH 4.5, 0.1 M).
d[NiFeSe]-H2ase (50 pmol) and dye (0.05 μmol) on TiO2 in AA-MES solution (3 mL, pH 6, 0.1 M each).
ePre-platinised TiO2 (2.5 mg) and dye (0.05 μmol) in aqueous AA solution (3 mL, pH 4.5, 0.1 M).
fTOFcat and TONcat were calculated as follows: TOFcat = n(H2) after 1 h/n(catalyst) and TONcat = n(H2) after x h/n(catalyst).
gTOFdye and TONdye were calculated as follows: TOFdye = 2n(H2) after 1 h/n(dye) and TONdye = 2n(H2) after x h/n(dye).
hNot determined due to the unknown amount of catalytically active sites; control experiments and optimisations of DSP systems are listed in Tables S3 to S7.