二维半导体异质结光催化分解水制氢研究

Recent Study of Photocatalytic Water Splitting for Hydrogen Generation Based on Two-dimensional Semiconductor Heterostructure

日益严重的环境污染和能源紧缺问题使人们开始研究可有效水解析氢的光催化剂。其中二维(2D)半导体光催化剂因其出众的比表面积而极具应用前景。为了克服光生电荷寿命短的关键问题,2D范德华(vdW)半导体异质结因其作为光催化剂时所展现的分离光生电子和空穴的强大能力而被广泛研究。总结了以vdW异质结为代表的2D水分解制氢光催化剂的最新研究。在论证了光催化水分解的氧化还原反应的基本原理之后,讨论了许多具有代表性的2D vdW异质结,并从理论与实验角度突出了基于过渡金属二卤化物(TMDs)和磷烯异质结作为光催化剂的研究及该研究领域中的机遇与挑战。介绍了2D vdW异质结在光催化剂中的应用,为提高水分解产生氢的效率提供了新的思路。

Due to increasingly serious environmental pollution,people are forced to explore efficient photocatalysts used to decompose water for hydrogen generation.Two-dimensional(2D)semiconductor photocatalyst holds the significant promise because of its novel physical and chemical properties,compared with bulk photocatalyst.To overcome the crucial problem of short lifetime for the photogenerated charges,2D van der Waals(vdW)heterostructures are used to be formed as a photocatalyst due to the awesome ability to separate the photogenerated electron-hole pairs.The recent development of 2D photocatalyst is reviewed,especially vdW heterostructure photocatalyst for water splitting.After demonstrating the fundamentals of light-driven redox reaction for water splitting,this paper makes a study of the transition metal dichalcogenides(TMDs)and phosphorus from theory and experiment in the highlight,which are used as heterostructure photocatalyst,introduces the application of 2D vdW heterostructure photocatalyst and discusses its opportunities and challenges.