Photocatalysis: 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 H 2 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 H 2 production using solar energy.