Platinum-free photoelectrochemical water splitting
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文摘
Hydrogen can be produced by photoelectrochemical water splitting in the presence of S2 鈭?/sup>/SO3 2鈭?/sup> sacrificial agent by using a Cu2S electrocatalyst grown on brass by chemical treatment in HCl and polysulfide solution. Photoelectrochemical behavior of Cu2S/brass was equivalent to that of Pt nanoparticles mixed with carbon black and deposited on a carbon cloth electrode, i.e. the electrocatalyst typically used in fuel cells and electrolyzers. Thus photoelectrochemical water splitting can be achieved in a Pt-free device. The photoanode was made of nanocrystalline titania on FTO sensitized by quantum dots. Combined ZnS/CdSe/CdS quantum dots were by far more effective for hydrogen production than single-component CdS sensitizer.
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