Key points are not available for this paper at this time.
Zn0.999Ni0.001S photocatalysts (energy gap = 2.3 eV) heat-treated at 773 K in an N2 flow showed activity for hydrogen evolution from aqueous solutions containing K2SO3 and Na2S as reducing reagents under visible light irradiation without co-catalysts such as Pt.
Kudo et al. (Sat,) studied this question.