A rationally designed two-dimensional MoSe2/Ti2CO2 heterojunction for photocatalytic overall water splitting: simultaneously suppressing electron-hole recombination and photocorrosion

被引：112

作者：

Fu, Cen-Feng ^{[1
]}

Li, Xingxing ^{[1
]}

Yang, Jinlong ^{[1
]}

机构：

[1] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

CHEMICAL SCIENCE | 2021年 / 12卷 / 08期

基金：

安徽省自然科学基金; 中国国家自然科学基金;

关键词：

DER-WAALS HETEROSTRUCTURES; Z-SCHEME PHOTOCATALYST; EFFICIENT; CELLS;

D O I：

10.1039/d0sc06132h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electron-hole recombination and photocorrosion are two challenges that seriously limit the application of two-dimensional (2D) transition metal dichalcogenides (TMDs) for photocatalytic water splitting. In this work, we propose a 2D van der Waals MoSe2/Ti2CO2 heterojunction that features promising resistance to both electron-hole recombination and photocorrosion existing in TMDs. By means of first-principles calculations, the MoSe2/Ti2CO2 heterojunction is demonstrated to be a direct Z-scheme photocatalyst for overall water splitting with MoSe2 and Ti2CO2 serving as photocatalysts for hydrogen and oxygen evolution reactions, respectively, which is beneficial to electron-hole separation. The ultrafast migration of photo-generated holes from MoSe2 to Ti2CO2 as well as the anti-photocorrosion ability of Ti2CO2 are responsible for photocatalytic stability. This heterojunction is experimentally reachable and exhibits a high solar-to-hydrogen efficiency of 12%. The strategy proposed here paves the way for developing 2D photocatalysts for water splitting with high performance and stability in experiments.

引用

页码：2863 / 2869

页数：7

共 47 条

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