1 Chemistry Department, University of Ferrara, Interuniversity Research Center on Chemical Conversion of Solar Energy, Via L. Borsari 46, 44121 Ferrara, Italy.
The tetraruthenium polyoxometalate water oxidation catalyst 1 performs very fast hole scavenging from photogenerated Ru(iii) polypyridine complexes, both in homogeneous solution and at a sensitized nanocrystalline TiO(2) surface.