Water splitting photoinduced

Kapoor, M.P., Inagaki, S.,and Yoshida, H. (2005) Novel zirconium-titanium phosphates mesoporous materials for hydrogen production by photoinduced water splitting. Journal of Physical Chemistry B, 109 (19), 9231-9238. 

From a consideration of thermodynamics, solar energy conversion by means of photoinduced charge separation followed by water splitting is a feasible process. 

FIG. 14 (a) Redox potentials for valence and conduction bands of Ti02 in comparison with the potentials for hole capture by water and electron capture by oxygen, (b) Schematic diagram of the initial stages of photoinduced water splitting at Ti02 nanoparticles modified by RUO2 and Pd clusters. 

Since the experiment of Fujishima and Honda in 1972, the direct use of semiconductor photoelectrodes or nanoparticles, have appeared to be an alternative way for achieving photoinduced water splitting, thanks to the possibility of obtaining, with a practically unitary quantum yield, highly energetic charge carriers that can induce the required electrochemical reactions at the solid/electrolyte interface. 

Figure 20.11 Photoinduced charge separation in immobilized systems relevant to the reductive part of water splitting (a) trinuclear ruthenium(ll) chromophore 51 for adsorption onto TI02 and (b) polymeric ruthenium(ll) chromophore including triarylamine electron acceptor units for adsorption onto ZnO.

Puntoriero, R, Sartorel, A., Orlandi, M., et al. (2011). Photoinduced Water Oxidation Using Dendrimeric Ru(II) Complexes as Photosensitizers, Coord. Chem. Rev., 255, pp. 2594—2601. 191. Orlandi, M., Argazzi, R., Sartorel, A., et al. (2010). Rnthenium Polyoxometalate Water Splitting Catalyst Very Fast Hole Scavenging from Photogenerated Oxidants, Chem. Commuru, 46, pp. 3152-3154. 

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