1T-2H MoSe2 modified MAPbI3 for effective photocatalytic hydrogen evolution

Organic-inorganic perovskites such as iodine methylamine lead (MAPbI(3)) shows superb photocatalytic prospect in the field of solar energy driven photocatalysis. However, its catalytic performance is insufficient due to serious charge recombination. In this article, 1T-2H MoSe2/MAPbI(3) composites were obtained by simple electrostatic adsorption method. The results of photocatalytic hydrogen production showed that 10 wt% 1T-2H MoSe2/MAPbI(3) performed the best hydrogen evolution rate of 552.93 mu mol.h(-1).g(-1), which was 23 times than that of pure MAPbI(3) (23.13 mu mol.h(-1).g(-1)). The long-term cyclic stability test also indicated that 1T-2H MoSe2/MAPbI(3) composites have good stability. The excellent hydrogen evolution rate activity is thoroughly investigated by optical/optoelectrochemical measurements, showing that 1T-2H MoSe2 as a cocatalyst can effectively transfer electrons and promote the separation of photogenerated charge. This study provided a reference for further exploration of MAPbI(3)-based catalysts with excellent catalytic activity. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study successfully prepared 1T-2H MoSe2/MAPbI(3) composites with excellent photocatalytic hydrogen production performance and good long-term stability. 1T-2H MoSe2 as a cocatalyst can effectively enhance electron transfer and promote the separation of photogenerated charge.