Photoelectrocatalysis on silicon in solar light

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Abstract
Photoelectrochemical measurements have been carried out on p-Si electrodes which contained islands of Pb, Cd, Au, Ni, Co, and Pt. These islands cause the photocurrent density of some of the Si systems to increase greatly (10×) in the middle region of the photocurrent potential curve. A plot of the change in potential observed for this region against log i0 for the dark hydrogen evolution on the metals concerned is linear with a slope close to that expected for a rate determining step at the metal-solution interface.