New Photocatalysts Based on Cadmium and Zinc Sulfides for Hydrogen Evolution from Aqueous Na_2S–Na_2SO_3 Solutions under Irradiation with Visible Light

摘要

Noble metal–free, Cd_(1-x)Zn_xS-based photocatalysts for hydrogen evolution from aqueous solu-tions of sodium sulfide and sodium sulfite upon irradiation with visible light (λ > 420 nm) have been synthe- sized and characterized by a complex of physicochemical methods. The effects of pH and catalyst and sub-strate concentrations on the rate of photocatalytic hydrogen evolution have been investigated. Under the optimal conditions, the quantum efficiency of the process is up to 12.9%.