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

摘要

Provided is a technique for high-efficient large-scale hydrogen generation through solar photocatalytic-photoelectrocatalytic decomposition of water, namely, a powder photocatalyst converts a soluble high valent state electron carrier into a low valent state under the illumination of the sun so as to achieve the large-area storage of sun energy, and at the same time, release oxygen gas and produce protons, and an electrolyte solution storing the electron carrier and the protons is transported to a photoelectrocatalysis tank. At the anode of the photoelectrocatalysis tank, a photogenic charge carrier is produced using sunlight and is used to oxidise the low valent state electron carrier into a high valent state, and at the cathode, the protons are combined to produce hydrogen gas. After collecting hydrogen gas, the electrolyte solution is returned to the photocatalysis system for recycling. The whole reaction is driven by sunlight and realises the conversion of solar energy to hydrogen energy.