Photo-catalysis research groupHomeScienceBusinessMediaProjectsTeamPublicationsGalleryNewsOpeningsContact

Band-gap funneling in bismuth-based hybrid perovskite photocatalyst with efficient visible-light-driven hydrogen evolution

2022-06-22

Abstract

The photocatalytic system using hydrohalic acid (HX) for hydrogen production is a promising strategy to generate clean and renewable fuels as well as value-added chemicals (such as X2/X3). However, it is still challenging to develop a visible-light active and strong-acid resistive photocatalyst.


Hybrid perovskites have been recognized as a potential photocatalyst for photovoltaic HX splitting. Herein, a novel environmentally friendly mixed halide perovskite MA3Bi2Cl9 – xIx with a bandgap funnel structure is developed, i.e., confirmed by energy dispersive X-ray analysis and density functional theory calculations. Due to gradient neutral formation energy within iodine-doped MA3Bi2Cl9, the concentration of iodide element decreases from the surface to the interior across the MA3Bi2Cl9 – xIx perovskite. Because of the aligned energy levels of iodide/chloride-mixed MA3Bi2Cl9 – xIx, a graded bandgap funnel structure is therefore formed, leading to the promotion of photoinduced charge transfer from the interior to the surface for efficient photocatalytic redox reaction.


As a result, the hydrogen generation rate of the optimized MA3Bi2Cl9 – xIx is enhanced up to ≈341 ± 61.7 µmol h1 with a Pt co-catalyst under visible light irradiation.

Band-gap funneling in bismuth-based hybrid perovskite photocatalyst with efficient visible-light-driven hydrogen evolution

by Yunqi Tang, Chun Hong Mak, Chen Wang, Yu Fu, Fang-Fang Li, Guohua Jia, Chang-Wei Hsieh, Hsin-Hui Shen, Juan Carlos Colmenares, Haisheng Song, Mingjian Yuan, Yue Chen, Hsien-Yi Hsu. Small Methods journal 2022.

DOI: 10.1002/smtd.202200326

First published: 22 June 2022
 

Article link:

https://​doi​.org/​10​.​1002​/​s​m​t​d​.​202200326


Our work has been highlighted on the Back Cover of Small Methods by Wiley publisher, preview:

https://​onli​ne​li​bra​ry​.wiley​.com/​d​o​i​/​e​p​d​f​/​10​.​1002​/​s​m​t​d​.​202270050 

Consider following us on social media   Link to Instagram      Link to LinkedIn      

Sign-up for our science Newsletter

website © jjmh.pl
HomeScienceBusinessMediaProjectsTeamPublicationsGalleryNewsOpeningsContact