Device for hydrogen production from water photolysis and method therefor

A method for hydrogen production from water photolysis, wherein the method adopts a device for hydrogen production from water photolysis comprising:

• a catalytic reaction unit for water photolysis comprising a light-transmitting surface, and a light condenser component with a light-concentrating surface facing the light-transmitting surface of the catalytic reaction unit for water photolysis;
• the light condenser component comprises a solar concentrating cone and a reflector for reflecting and concentrating sunlight into the solar concentrating cone;
• the catalytic reaction unit for water photolysis comprises a water photolysis reactor;
• the water photolysis reactor comprises a container with an opening at the top and a light-transmitting cover arranged at the opening, and at least one side of inner wall of the container or an inner surface of the light-transmitting cover close to the container is embedded with a catalyst for hydrogen production from water photolysis;
• the catalyst for hydrogen production from water photolysis comprises a polyhedral strontium titanate catalyst and/or a polyhedral strontium titanate composite catalyst;
• the polyhedral strontium titanate catalyst comprises an octadecahedron strontium titanate catalyst and/or a polyhedron strontium titanate catalyst having twenty-six faces;
• a preparation method for the octadecahedron strontium titanate catalyst comprises:
• mixing strontium titanate and strontium iodide with a mass ratio of 1:6, and performing heat treatment at 1200° C. for 5 h to obtain the octadecahedron strontium titanate catalyst;
• a preparation method for the polyhedron strontium titanate catalyst having twenty-six faces comprises:
• mixing strontium titanate and strontium bromide with a mass ratio of 1:2, and performing heat treatment at 800° C. for 10 h to obtain the polyhedron strontium titanate catalyst having twenty-six faces;
• the method for hydrogen production from water photolysis comprises the following steps:
• (I) adding raw materials for hydrogen production from water photolysis to the catalytic reaction unit for water photolysis;
• and
• (II) reflecting sunlight onto the solar concentrating cone by using the reflector, concentrating sunlight, and projecting sunlight into the catalytic reaction unit for water photolysis to perform a photocatalytic water splitting reaction to obtain a gas product;
• the raw materials for hydrogen production from water photolysis in step (I) comprise water and a catalyst for hydrogen production from water photolysis;
• in the raw materials for hydrogen production from water photolysis in step (I), a concentration of the catalyst for hydrogen production from water photolysis is any one of 1 mg/L, 1.5 mg/L or 2 mg/L.