Photocatalytic overall water splitting under visible light by TaON and WO3 with an IO3 (-)/I- shuttle redox mediator

Photocatalytic water splitting into H-2 and O-2 under visible-light irradiation (lambda > 420 nm) is demonstrated using the oxynitride Pt-TaON for H-2 evolution and a Pt-WO3 catalyst for O-2 evolution in an IO3-/I- shuttle redox-mediated system.