This paper presents a novel dye-sensitized photocatalysis system for photochemical hydrogen evolution by employing reduced graphene oxide (RGO) as a catalyst scaffold and an efficient electron relay mediator between photosensitizer and catalyst. Under visible light irradiation (?=420 nm), the photocatalyst of Eosin Y sensitized reduced graphene oxide (RGO) with dispersed Pt nanoparticles (EY-RGO/Pt) exhibits high efficient activity for hydrogen evolution from water reduction. An apparent quantum yield up to 9.3% for hydrogen evolution has been achieved at 520 nm over this photocatalyst. The excellent electron-accepting and electron-transporting properties of RGO greatly facilitate the electrons transfer from excited dye to Pt catalyst, which promoting the photocatalytic activity for hydrogen evolution. A possible mechanism was proposed on the basis of the results of photoelectrochemical and photoluminescence measurements.

High efficient visible light driven water reduction by dye-sensitized reduced graphene oxide photocatalyst

245th National Meeting (2013)

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