Multidimensional Perovskite for Visible Light Driven Hydrogen Production in Aqueous HI Solution

A simple and efficient method is applied for the preparation of methylammonium lead iodide perovskite (MAPbI(3)), which is defined as a threedimensional (3D) perovskite, and octadecylammonium lead iodide perovskite (OA(2)PbI(4)), which is defined as a 2D perovskite; meanwhile, multidimensional perovskite (MDP) is based on the two materials mentioned above with a general formula OA(x)MA(1-x)PbI(3) in which x represents the different content of the relative component. It is demonstrated that MDP has a higher charge transfer ability than traditional 3D perovskite and enhanced performance compared to that of 2D perovskite. Finally, it is found that the MDP material can balance good charge transfer and efficient electron-hole separation ability from 2D perovskite and a full visible range absorption ability comes from 3D perovskite. The prepared OA(0.15)MA(0.85)PbI(3) is studied in visible light driven photocatalytic H-2 evolution in aqueous HI solution, resulting in a continuous PHE in 24 h with a rate of 535.9 mu mol g(-1) h(-1), which is much higher than the pristine MAPbI(3) with a rate of 276.1 mu mol g(-1) h(-1). Moreover, the quantum efficiency of PHE was determined to be 1.67% for OA(0.15)MA(0.85)PbI(3) under the irradiation at 420 nm.

Automated summary

A simple and efficient method was applied to prepare multidimensional perovskite with enhanced performance, demonstrating higher charge transfer ability and improved photocatalytic efficiency compared to traditional 3D and 2D perovskite materials.