Stable hybrid perovskite MAPb(I1-xBrx)3 for photocatalytic hydrogen evolution

被引：75

作者：

Zhao, Zhijie ^{[1
]}

Wu, Jiaojiao ^{[1
]}

Zheng, Yan-Zhen ^{[2
]}

Li, Nan ^{[1
]}

Li, Xitao ^{[1
]}

Ye, Zhili ^{[1
]}

Lu, Siyu ^{[3
]}

Tao, Xia ^{[1
,2
]}

Chen, Chuncheng ^{[4
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, 15 Beisanhuan East Rd, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, Minist Educ High Grav Engn & Technol, Res Ctr, 15 Beisanhuan East Rd, Beijing 100029, Peoples R China

[3] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450000, Henan, Peoples R China

[4] Univ Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Photochem, Beijing, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2019年 / 253卷

基金：

中国国家自然科学基金;

关键词：

MAPb(I(1-)xBrx)(3); Hydrogen evolution; Perovskite; Photocatalyst; Visible light; SOLAR-CELLS; HIGH-PERFORMANCE; SINGLE-CRYSTALS; EFFICIENT; BANDGAP; FILMS; MANAGEMENT; DYNAMICS; METALS; IODIDE;

D O I：

10.1016/j.apcatb.2019.04.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hybrid organic-inorganic perovskites have been pursuing for solar/visible-driven H-2 evolution from hydrohalic acid (HX) splitting, but their inherent structural stability and performance are still challenging. Herein, we report on a stable hybrid perovskite MAPb(I1-xBrx)(3) (x = 0-0.20) obtained by one-pot crystallization in a mixed halide parent solution and its implementation as a newcomer photocatalyst for H-2 evolution in aqueous HX solution. MAPb(I1-xBrx)(3) is demonstrated to be a superior visible-light-driven photocatalyst for H-2 evolution in aqueous HI/HBr solution with no Pt as a cocatalyst. An optimized MAPb(I1-xBrx)(3) (x = 0.10) shows a highest H-2 evolution rate of 1471 mu mol h(-1) g(-1) under visible light (lambda >= 420 nm) illumination, which is (similar to)40 times higher than that of pure MAPbI(3), and the dual-halide perovskite is rather stable showing no obvious decrease in the photocatalytic activity over 60 runs (252 h). The perovskite inherent structural stability is further evidenced by XRD, UV-vis spectra and EDS elemental mapping of MAPb(I1-xBrx)(3) measured after cycled photocatalytic reaction. The solar HI splitting efficiency of MAPb(I1-xBrx)(3) (x = 0.10) is determined as 1.42%. The mechanism behind photocatalytic H-2 evolution enhancement is elucidated by the experimental and computational methods.

引用

页码：41 / 48

页数：8

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