Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

The perovskite oxynitride SrTaO₂N is a promising compound for solar energy conversion because it has strong visible light absorption at wavelengths as long as 650 nm. However, the photocatalytic activity of SrTaO₂N is generally very poor. We managed to improve its activity by incorporating Sr in its B site.