论文部分内容阅读
he technology of semiconductor-based photoelectrochemical water splitting to produce hydrogen using solar energy has been considered as one of the most important approaches to solving the world energy crisis.Introducing plasmonic-metal nanoparticles into a semiconductor photoanode has been explored to improve the photocatalytic activity for water splitting because they effectively enhance the light absorption and promote the separation of photo-generated electron-hole pairs in a semiconductor.However,the photocatalytic efficiencies by decorating metallic nanoparticles on semiconductor are not modulatable and programmable because of the complex and interrelated interactions in composite.We demonstrate the feasibility of using SPR-based CdS-Au multi-segmented NRAs as photoanodes for programmable PEC water splitting.The photocatalytic activity can be linearly modulated by the number of CdS-Au segments in a NR.The orderly arrangements of plasmonic-metal segments in the composite photocatalysts play a critical role in realizing the programmable PEC water splitting.Significantly,under the simulated AM 1.5G illumination,the CdS-Au multi-segmented NRAs exhibited excellent PEC properties with a photocurrent of 10.5mA/cm2 at 0V(vs.Ag/AgCl),making them competent as photoanode for H 2 production using solar energy.