Perovskite CsCuCl_xBr_3-x Microcrystals

Band Structure, Photochemical Stability, and Photocatalytic Properties

authored by

Shuang Chao Tang, Yan Jie Li, Jing Yang, Ting Zhao, Jie Tian, Yan Jie Wang, Zhuo Yu Ji, Yu Li, Yi Tao Dai, Tao He, Yong Wei Zhang, Alexei V. Emeline, Qi Pang, Detlef W. Bahnemann, Jia Hong Pan

Abstract

Although Pb-based metal halide perovskites (MHPs) have excellent photoelectric characteristics, its toxicity remains a limiting factor for its widespread application. In the paper, a series of CsCuCl_xBr_3-x (x=1, 2, 3) MHPs microcrystals were developed and their hydrogen evolution performance in ethanol and HX (X=Cl, Br) were also studied. Among them, CsCuCl₃ microcrystals exhibit high hydrogen evolution performance in both HX and ethanol, attributed to its longest average lifetime and suitable band structure. Additionally, the effect of different sacrificial agents on photocatalytic hydrogen production indicates that the photogenerated hole (h⁺) plays a critical role. MHPs can maintain a dynamic equilibrium of dissolution and precipitation in HX saturated aqueous solutions, thereby overcoming the stability issues associated with perovskite. The phase transition of CsCuCl_xBr_3-x during photocatalysis is monitored by XRD technique. CsCuCl₃ shows high stability in saturated HCl aqueous solution, and excellent photocatalytic performance with a hydrogen production rate of CsCuCl₃ microcrystals reached 103.98 μmol g⁻¹ at 210 min. Our study expands the development prospects of CsCuCl₃ in the field of photocatalytic solar fuel generation.

Organisation(s)

Institute of Technical Chemistry

External Organisation(s)

North China Electric Power University
Guangxi University
A-STAR
University of the Chinese Academy of Sciences (UCAS)
National Center for Nanoscience and Technology
University of Science and Technology of China
Saint Petersburg State University

Type

Article

Journal

CHEMSUSCHEM

No. of pages

11

ISSN

1864-5631

Publication date

23.12.2024

Publication status

Accepted/In press

Peer reviewed

Yes

ASJC Scopus subject areas

Environmental Chemistry, General Chemical Engineering, General Materials Science, General Energy

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1002/cssc.202402094 (Access: Closed)