Binary metal oxides have been recently applied for electrocatalytic and photocatalytic water splitting. Common metal oxides are synthesized using earth’s crust abundant elements such as Ti, Cu, Fe and Zn in order to reduce costs.On the other hand, ternary oxides as those of the delafossite group, have also proved to be suitable for direct water splitting. In either case, metal oxide materials intend to replace the utilization of noble metals for the generation of H2. According to literature, the efficiencies obtained using noble metal nanoparticles, carbon based materials or several metal oxides coupled in a tandem configuration are superior than those obtained using a single metal oxide layer. Nevertheless, the synthesis process often requires the utilization of various techniques in order to obtain the desired heterostructured configuration. Besides, since surface area plays a determining role in direct water splitting, it is believed that the utilization of various nanostructured morphologies will result in an increase of the H2 production