ZnSe and CdS Co-Sensitized TiO Nanorod Arrays as Photoanodes for Bias-Free Solar Hydrogen Evolution.

The efficient charge separation and surface state reactions are significant in enhancing the efficiency of photoelectrochemical hydrogen evolution. Herein, we report a ternary heterostructure consisting of CdS/ZnSe sensitized TiO nanorod as a photoanode. The heterojunction photoanode considerably widens the photon absorption spectral range and thereby enhances the photocurrent density up to 2 mA/cm at 1.