基于镍基硒化物的高效光催化产氢助催化剂研究

光催化分解水制氢是一种重要的且有工业应用前景的制氢途径。发展高效稳定及廉价光催化剂和反应系统是研究核心。助催化剂的使用是一种有效提高光催化过程效率的重要手段。申请人在前期工作中发现电催化性能优异、廉价的镍基硒化物具有较好的光催化产氢增强性能，是很有可能成为可替代贵金属的优异光催化产氢助剂，具有可预期的应用前景。但是目前关于镍基硒化物在光催化应用中的研究还甚少并且还存在一些关键问题需要深入探索。为此，本课题基于强化光生载流子分离及其定向迁移的研究思路；以镍硒化合物为光催化助剂，选择光催化性能较好的主催化剂；从光催化剂设计合成入手，通过调控镍硒化合物组分、形貌结构及其组装方式建立合适的可控制备方法，尝试构建新型、高效、稳定且具有可见光响应的光催化剂；深入研究材料的构-效关系及其调控规律、光催化作用本质及反应机理；进一步提高光催化制氢效率；拓展电催化材料在能源光催化等领域的工业化应用

Photocatalytic decomposition of water for hydrogen production is an important and promising way for industrial application. The development of efficient, stable and cheap photocatalysts and reaction systems is the core of research. The use of cocatalyst is an important and rational means to improve the efficiency of photocatalytic process. In the preliminary work, the applicant found that the low-cost nickel-based selenides with excellent electrocatalytic performance can effectively boost photocatalytic hydrogen production. This makes them likely to become an excellent photocatalytic hydrogen production cocatalyst instead of noble metals, and holds great promise for industrial application. However, there are few researches on the use of nickel-based selenides in photocatalysis, and some key problems (e.g., structure - activity relationship) need to be further explored. Therefore, this project is based on the research idea of strengthening the separation and migration of photo-induced carriers. The semiconductor catalyst with better photocatalytic performance is selected and coupled with the cocatalyst nickel selenide. Starting from the rational design, a suitable preparation method is expected to construct a new, efficient, stable and visible-light response photocatalyst by adjusting the composition, morphology and structure and coupling mode. We plan to systematically investigate the structure - activity relationship of materials and its photocatalytic mechanism. This project aims to further improves the efficiency of photocatalytic hydrogen production and expands the industrial application of electrocatalysis materials in energy photocatalysis.