Hydrogen energy, as a renewable and clean chemical fuel, has a very high calorific value (1.43×108 J·kg-1) and energy density (0.0899 g·L-1). It is one of the most ideal clean and renewable energy sources without producing greenhouse gases in the process of replacing fossil fuels. Currently, most of the studied methods for solar hydrogen production need additional driving forces such as heat, electricity and magnetism. There is still a big gap to realize the real "artificial leaves". The purpose of our research is to prepare an integrated PEC device without any wire connection and extra energy for hydrogen production. Based on above problem, our research group carries out the following researches.
1. Based on semiconductor micro/nano processing process, realize the miniaturization and independence of integrated photoelectric chemical devices to improve the durability of devices.
2. Using e-beam deposition, laser sputtering deposition and other thin film deposition technology, ultra-thin and transparent high-performance metal oxide electrocatalyst film is prepared, which is used to integrate PEC devices to achieve efficient and stable solar energy conversion to produce hydrogen.
3. Laser in situ direct drawing material realize the synthesis of high-quality three-dimensional porous graphene, used as catalyst carrier. The metal oxide nanoparticle catalysts localized and selectively are prepared by laser in situ deposition technique for efficient electrocatalytic reaction of oxygen and hydrogen evolution.
4. Laser in situ deposition of nanoparticles on the surface of regular supporters can achieve universal preparation of hollow structure of metal oxides and sulfides, which is used to improve the electrocatalytic performance.
