LARGE-SCALE HYDROGEN GENERATION METHOD THROUGH SOLAR PHOTOCATALYTIC-PHOTOELECTROCATALYTIC DECOMPOSITION OF WATER

The present invention provides an efficient large-scale hydrogen production technology from solar energy through photocatalytic-photoelectrocatalytic decomposition of water. Namely, a powdery photocatalyst, irradiated by sunlight, converts a soluble high-valence electron carrier into a low-valence ion to realize large area storage of solar energy, emits oxygen and produces protons; the electrolyte solution that stores the electron carrier and the protons is delivered into a photoelectrocatalytic pool; an anode of the photoelectrocatalytic pool uses sunlight to produce a photocarrier to oxidize the low-valence electron carrier into high-valence electron carrier; hydrogen is produced by the protons on a cathode; and after the hydrogen is collected, the electrolyte solution is returned to the photocatalytic system for recycle. The whole reaction realizes conversion from the solar energy to hydrogen energy under the drive of the sunlight.