In 2019, Shinshu University Special Contract Professor Domen Kazunari and colleagues developed the powdered oxysulfide photocatalyst Y2Ti2O5S2 that absorbs sunlight of wavelengths below 650 nm and splits water into hydrogen and oxygen.
Click here for original story, Enhancing the conversion efficiency of powdered photocatalysts that generate hydrogen from water under visible light
Source: Phys.org