24_46b/2012Photocatalysis: Iodine-Doped-Poly(3,4-Ethylenedioxythiophene)-Modified Si Nanowire 1D Core-Shell Arrays as an Efficient Photocatalyst for Solar Hydrogen Generation (Adv. Mater. 46/2012)

Xiao-Hong Zhang and co-workers demonstrate on page 6199 a new one-dimensional core–shell strategy in the development of a stable visible-light photoanode for a hydrogen-generation photoelectrochemical cell. This Si/iodine-doped PEDOT one-dimensional nanocable array shows an encouraging solar-to-chemical energy conversion efficiency of 3.0%, and a H2 evolution rate of 112.39 μmol cm−2 h−1 under 100 mW cm−2 illumination. Coating with iodine-doped poly(3,4-eth-ylenedioxythiophene) (PEDOT:I) enhances the photocatalytic efficiency and stability of SiNW arrays. This proposed PEC cell model shows a promising structure for H2 production using solar energy.

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