Enhanced H2 evolution over an Ir-doped SrTiO3 photocatalyst by loading of an Ir cocatalyst using visible light up to 800 nm.

Ir cocatalyst-loaded SrTiO3:Ir has arisen as a promising photocatalyst for H2 evolution with a response to the whole range of visible light up to 800 nm. The key factor for the high activity lies in H2-reduction after loading of an Ir cocatalyst to obtain metallic and adhesive Ir-cocatalysts.