单原子掺杂NiO纳米片促进半导体光催化全分解水产氢

光催化全分解水产氢被认为是解决能源和环境问题的途径之一。目前报道的工作主要集中在使用助催化剂来提高半导体的性能，但产氢效率依然很低。主要的困难是水的氧化速率太低。如何发展高效廉价产氧助催化剂提升水的氧化过程，来间接提高全分解水产氢效率是一个难点。针对上述问题，本项目拟采用非贵金属NiO纳米片作为产氧助催化剂的研究对象，采用具有较多外层空d轨道的金属对其进行表面单原子掺杂，使其成为高效氧化水的活性位点。开发不同金属离子所需要的制备方法；研究不同的掺杂金属对水氧化性能的调控规律，给出最优的水氧化活性NiO基单原子掺杂材料。耦合不同的半导体进行光催化全分解水研究，考察不同的复合体系与活性之间的关联，研究不同的NiO材料对光催化全分解水产氢的促进规律，实现基于NiO纳米片全分解水效率的新突破。本项目为发展高效光催化全分解水产氢提供新的路径和技术支持。

Photocatalytic water splitting to H2 generation has been regarded as one of the ways to solve energy and environmental issues. The reported papers only focus on loading co-catalysts for improving the performance of semiconductors, however, the efficiency of water splitting for H2 generation is still low. The main difficulty is the low water oxidation rate. How to develop cheap and efficient O2 generation co-catalysts for improving water oxidation steps and then promoting the water splitting to H2 generation is one difficult point. To address the above issues, non-noble metallic NiO is intended to be used as the O2 evolution co-catalyst of the photocatalytic overall water splitting system in this project, and will be treated via surface single-atom doping (SAD) by rich-empty d orbital metal ions. The SAD sites are expected to be efficient for water oxidation, and the corresponding methods for achieving the SAD of the different ions will be studied, the regulating characteristics in water oxidation performance by the different SAD doped ions will be studied. And then the optimal NiO-based materials for efficient water oxidation will be given. Next, the NiO-based samples will be loaded onto the surface of semiconductors for photocatalytic overall water splitting. The relationship between activity and compound systems will be studied. The different NiO-based materials will be studied for photocatalytic overall water splitting to H2 generation, and then a new breakthrough in the overall water splitting efficiency will be obtained. This project provides a new path and theoretical support for the development of efficient photocatalytic water splitting to H2 generation.