Photoelectrocatalytic H evolution from integrated photocatalysts adsorbed on NiO.

A new approach to increasing the faradaic efficiency of dye-sensitised photocathodes for H evolution from water, using integrated photocatalysts, furnished with ester groups on the peripheral ligands, [Ru(decb)(bpt)PdCl(HO)](PF) () and [Ru(decb)(2,5-bpp)PtI(CHCN)](PF) (), (decb = 4,4'-diethylcarboxy-2,2'-bipyridine, bpp = 2,2':5',2''-terpyridine, bpt = 3,5-bis(2-pyridyl)-1,2,4-triazole) is described. Overall, |NiO is superior to previously reported photocathodes, producing photocurrent densities of 30-35 μA cm at an applied bias of -0.2 V Ag/AgCl over 1 hour of continuous white light irradiation, resulting in the generation of 0.