Interfacial‐Engineered Co<sub>3</sub>S<sub>4</sub>/MnCdS Heterostructure for Efficient Photocatalytic Hydrogen Evolution
Lina Yang, Qingzheng Tian, Xiaomei Wang, Hui Yang, Alan Meng, Zhenjiang Li
Abstract
Herein, a novel non‐noble metal photocatalyst Co 3 S 4 /MnCdS (CS/MCS) for highly efficient hydrogen evolution has been successfully prepared through a simple hydrothermal method. Due to the work function difference between CS and MCS, an interfacial internal electric field is formed at the interface region of CS/MCS when the two components are in intimate contact. Upon light illumination, the photogenerated charge carriers transfer in S‐scheme‐like type through the interfacial CoS bonds. This facilitates charge separation and diffusion and broadens light absorption of the photocatalyst. Thus, the obtained CS/MCS composite shows a superior photocatalytic performance of 7,999.89 μmol h −1 g −1 with a 4.88% apparent quantum efficiency at 420 nm and a good photostability (about 96.2% H 2 evolution retention over 5 cycles). To the best of our knowledge, this is a rare research on S‐scheme heterostructure characteristic of type‐I energy band alignment. This work provides new ideas for developing more efficient noble‐metal‐free photocatalysts for hydrogen evolution.