Figure 12. Schematic representations of selected photobiocatalytic systems.

(A) Photocatalytic H₂ production by Desulfomicrobium baculatum NiFeSe hydrogenase immobilised on TiO₂ nanoparticles that were dye-sensitised with an Ru complex, as reported by Reisner et al. TEAO was the sacrificial reductant. This hydrogenase was selected for characteristics such as its high TOF and fast intramolecular electron transfer (ET). Reproduced with permission from ref. [56]. (B) Photocatalytic H₂ production using Synechococcus sp. photosystem I (PS I) linked to Clostridium acetobutylicum FeFe hydrogenase (HydA) via a molecular dithiolate wire (red), reproduced with permission from ref. [62] by Lubner et al. Copyright 2011 National Academy of Sciences. (C) Photocatalytic water splitting by electronically interlinked Thermosynechococcus elongatus photosystem II and D. baculatum NiFeSe hydrogenase on separate ITO surfaces. Reproduced with permission from ref. [68] by Mersch et al.