Amount of H2 produced by [Mo3S13]2− in homogeneous (Mo3/Ru) and heterogeneous (Mo3/GCN) photosystems after 60 min of visible light illumination with 445 nm. Turnover frequencies (TOFs) are calculated based on the real [Mo3S13]2− loadings derived from TXRF (Table 1). Blank experiments in the absence of [Mo3S13]2− resulted in a negligible (<0.1 nmol) amount of H2 generated.
| Phase | Catalyst | Sacrificial donor | Solvent | Photosensitizer | H2 (nmol) | TOF (min−1) |
|---|---|---|---|---|---|---|
| Homogeneous | [Mo3S13]2−50 μM | H2A 0.1 M | MeOH : H2O (9 : 1) | [Ru(bpy)3]PF6 | 390 | 0.065 |
| TEOA 0.1 M | 0.645 mM | <0.1 | — | |||
| Heterogeneous | Mo3/GCN 10 wt% | H2A 0.1 M | H2O | None | 52 | 0.062 |
| TEOA 0.1 M | 197 | 0.237 | ||||
| Mo3/GCN 1 wt% | TEOA 0.1 M | 9 | 0.117 | |||
| Mo3/H-GCN 10 wt% | TEOA 0.1 M | 241 | 0.221 |