表面等离子共振热电子注入机理及在光催化与光电催化应用中的研究进展

Mechanistic Understanding of Plasmon-induced Hot Electron Injection for Photocatalytic and Photoelectrochemical Solar-to-Fuel Generation

由于金属纳米晶表面等离子共振产生的热电子效应,金属/半导体异质纳米晶的可控合成对于增强半导体光催化与光电催化性能具有显著的促进作用。本综述阐述了热电子产生与驰豫的微观机制,探讨了影响热电子在金属-半导体异质纳米晶中界面传递效率的关键因素及异质界面调控合成的重要性,简要介绍了热电子注入效应在光催化与光电催化制备太阳能燃料研究中的应用进展,分析了目前存在的主要问题并对该领域未来的发展趋势进行了展望。

Hot electrons derived from the surface plasmon resonance of metallic nanocrystals have been demonstrated to play a promising role in promoting the efficiency of photocatalytic and photoelectrochemical solar-to-fuel generation. In this review,we try to describe the underlying mechanisms of the generation and relaxation process of hot electrons,give a discussion on the key factors that affect the efficiency of hot electron injection from metal to semiconductor,and provide an overview of the research progress on hot electronmediated photocatalytic and photoelectrochemical water splitting. This review also outlines the critical limitations in current studies and sheds light on the possible future developments in this research field.