高活性、高稳定性、低成本的铜基氧化物光电阴极的合成与研究

以太阳光为能源，水为唯一原料生产氢气和氧气，是能源化工领域的研究热点，也是实现能源可持续发展、消除环境污染的重要途径。铜基氧化物半导体是一类廉价易得、环境友好的材料被广泛运用于光电催化领域。但是，不同的铜基氧化物半导体也存在着诸如低活性或易失活等缺点。目前，学术界对如何利用铜基氧化物制备高活性、高稳定性、低成本的光电阴极还没有清晰完整的认识。本项目将在前期研究的基础上，系统研究铜基氧化物的晶面各向异性（包括载流子迁移、活性、稳定性）、表界面性质、反应机理、失活机理、反应动力学等特性。并采取具有针对性的方案，稳定化CuO、Cu2O等易失活铜基氧化物半导体，同时着力提高铜铁矿类铜基氧化物半导体的产氢活性。最后，本项目将采用优化后的铜基氧化物半导体光电阴极构建光电催化水分解串联电池和三元的光伏-光电极体系，为该技术的实用化和大规模工业化做充分准备。

Splitting water into hydrogen and oxygen by using solar light as energy and water as the only raw material has been considered as a hotspot in the field of energy chemical industry, which is also an important way to realize the sustainable development and eliminate the pollution of the environment. Copper based oxide semiconductor is a kind of cheap, environmentally friendly material, which is widely used in photoelectrocatalysis. However, different copper based oxide semiconductors also have disadvantages such as low activity and deactivation. At present, in academia it is still unclear that how to prepare highly active, stable and cheap photocathodes with copper based oxide semiconductors. Based on the previous research, this project will systematically study the characteristics of copper based oxide semiconductors, such as crystal facet anisotropy (including carrier mobility, activity and stability), surface and interfacial properties, reaction mechanisms, deactivation mechanisms, kinetics, etc. Besides, specific methods will be applied to stabilize the unstable copper based oxide semiconductors (CuO, Cu2O, etc.), meanwhile, to enhance the hydrogen evolution performance of the delafossite copper based oxide semiconductors. Finally, this project will adopt the optimized copper oxide semiconductor photocathodes to build photoelectrochemical tandem cells and three-component photovoltaic-photoelectrode systems, preparing for the practical applications and large-scale industrialization of this technology.