Abstract

A hybrid thermochemical water-splitting cycle using solar energy is proposed and experimental results are presented. The cycle consists of a photochemical reaction conducted in a flat cell with a Fresnel lens and concentrating the remaining solar energy on a thermoelectric generator which produces electric power for the electrolysis steps. The photochemical reaction is: 2 Fe 2++ I −+ light→2 Fe 3++3 I − The overall efficiency is estimated to be as high as 15–25%.

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