Single‐Step Preparation of Large Area TiO₂ Photoelectrodes for Water Splitting

The fast, single‐step and easily scalable production by plasma electrolytic oxidation (PEO) of large area TiO 2 electrodes with excellent photoactivity in water splitting under simulated solar light is systematically investigated here. In particular, the effects that the cell voltage (100–180 V) and the processing time (0.5–15 min) have on the electrode properties are studied. The PEO‐produced oxide layers are porous, the predominant crystalline...