Ever since Fujishima and Honda first discovered in 1972, the electrochemical photolysis of water in the presence of TiO 2 catalyst to produce H 2 gas has become an active research area to understand the mechanism of photolysis, and to find cheaper substitutes TiO 2 as solutions to current energy problems. Numerous studies show that other nano-scaled metal oxides can also play an important role as photocatalysts in water-splitting reactions 1 to produce H 2 , overcoming the cost and challenges of TiO 2 . However, scaling up H 2 gas production using metal oxides or metal oxide co-catalysts derived from noble metals like Pt, Ru and Rh is a problem due to the high temperatures required for synthesis and related costs. There is also the problem of finding suitable substrates for the photo-catalysts to operate at room temperature.