Hydrogen is an ideal energy for the development of human society in the future. The key to photolysis of water to H2 is photocatalyst with high performance. This paper discusses the mechanism of photolysis of water, and summarizes the research progress of TiO2, transition metal oxides, layered metal oxides, photobiocatalysts and other new complexes in photolysis of water in recent years, The ways to improve its photocatalytic activity were discussed, and the existing problems and prospects were prospected

Hydrogen will replace fossil fuels and become one of the main energy sources in the future. Solar hydrogen energy conversion is the development direction of hydrogen industrial production technology. The key to photoelectrochemical hydrogen production is the research of single junction and multi junction solar cells with high efficiency and low cost; The key to the research of photocatalytic hydrogen production lies in the research of the basic theory of photocatalysis and the synthesis of high-efficiency, low-cost and long-life photocatalytic materials. However, "hydrogen economy" will become inevitable, and the industrialization of clean and efficient hydrogen production technology will become a reality in the far future. Solar hydrogen production equipment researched and manufactured by Qingdao xinyuanhui New Energy Technology Co., Ltd. our company has developed a breakthrough low-cost technology to produce renewable hydrogen by using sunlight and water (any water source including seawater and wastewater). Different from hydrocarbon fuels such as oil, coal and natural gas, when these fuels are used, carbon dioxide and other pollutants will be released into the atmosphere, and the only by-product of green hydrogen is pure water. By optimizing water electrolysis technology at the photosynthetic level, its low-cost solar photosynthesis can effectively use sunlight to separate hydrogen from water and produce environment-friendly renewable hydrogen. Using this method, renewable electricity and hydrogen fuel cell vehicles realize a distributed hydrogen production world. Qingdao xinyuanhui New Energy Technology Co., Ltd. cooperates with you to win the future.