Ta-Doped porous TiO₂ nanorod arrays by substrate-assisted synthesis: efficient photoelectrocatalysts for water oxidation

Ta-doped porous TiO2 nanorod arrays on a Ta substrate are synthesized and used as a photoanode for photoelectrochemical water oxidation. The Ta substrate provides Ta dopants and also plays a vital role in the formation of nanopores in the nanorods.