Composite of formamidinium lead bromide perovskite FAPbBr3 with reduced graphene oxide (rGO) for efficient H2 evolution from HBr splitting

Qianqian Zhang; Yaqiang Wu; Hui Fu; Zaizhu Lou; Zeyan Wang; Yuanyuan Liu; Zhaoke Zheng; Hefeng Cheng; Ying Dai; Baibiao Huang; Peng Wang

doi:10.1016/j.jcis.2024.03.057

Composite of formamidinium lead bromide perovskite FAPbBr₃ with reduced graphene oxide (rGO) for efficient H₂ evolution from HBr splitting

J Colloid Interface Sci. 2024 Jun 15:664:809-815. doi: 10.1016/j.jcis.2024.03.057. Epub 2024 Mar 11.

Authors

Qianqian Zhang¹, Yaqiang Wu², Hui Fu¹, Zaizhu Lou³, Zeyan Wang¹, Yuanyuan Liu³, Zhaoke Zheng¹, Hefeng Cheng¹, Ying Dai⁴, Baibiao Huang¹, Peng Wang⁵

Affiliations

¹ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
² State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China. Electronic address: yaqiangwu@sdu.edu.cn.
³ Institute of Nanophotonics, Jinan University, Guangzhou 511443, China.
⁴ School of Physics, Shandong University, Jinan 250100, China.
⁵ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China. Electronic address: pengwangicm@sdu.edu.cn.

PMID: 38492382
DOI: 10.1016/j.jcis.2024.03.057

Abstract

Solar hydrobromic acid (HBr) splitting using perovskite photocatalysts provides an attractive avenue to store solar energy into hydrogen (H₂) and bromine (Br₂), while an efficient photocatalytic system is still demanded. As for the semiconductor photocatalyst, formamidinium perovskites show some superiorities in structural stability, light adsorption and charge dynamics compared to their methylammonium counterparts, which are fitter for the photocatalysis process. Herein, the composite of formamidinium lead bromide perovskite (FAPbBr₃) with reduced graphene oxide (rGO) is prepared using a facile photoreduction method. Under simulated sunlight irradiation (AM1.5G, 100 mW cm^-2), this FAPbBr₃/rGO composite (100 mg) demonstrates a noteworthy enhancement in photocatalytic H₂ evolution activity of 386.7 μmol h^-1, and it exhibits a notable stability with no significant decrease after 50 h of repeated tests. The single particle PL (photoluminescence) microscope is employed to study the charge dynamics, revealing that rGO in the composite effectively promotes the carrier separation. This work provides a highly efficient and stable photocatalyst for HBr splitting, and offers an effective modification strategy on lead bromide perovskites.

Keywords: HBr splitting; Halide perovskite photocatalysis; Hydrogen evolution; Reduced graphene oxide.