Layered Perovskite Oxychloride Bi4NbO8Cl: A Stable Visible Light Responsive Photocatalyst for Water Splitting

被引:390
作者
Fujito, Hironori [1 ]
Kunioku, Hironobu [1 ]
Kato, Daichi [1 ]
Suzuki, Hajime [1 ]
Higashi, Masanobu [1 ]
Kageyama, Hiroshi [1 ,2 ]
Abe, Ryu [1 ,2 ]
机构
[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Nishikyo Ku, Kyoto 6158510, Japan
[2] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan
基金
日本科学技术振兴机构;
关键词
HYDROGEN-PRODUCTION; OXYNITRIDE; O-2; PHOTOANODE; BIOCL; FABRICATION; SM2TI2S2O5; REDUCTION; LATIO2N; H-2;
D O I
10.1021/jacs.5b11191
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Mixed anion compounds are expected to be a photocatalyst for visible light-induced water splitting, but the available materials have been almost limited to oxynitrides. Here, we show that an oxychrolide Bi4NbO8Cl, a single layer Sillen-Aurivillius perovskite, is a stable and efficient O-2-evolving photocatalyst under visible light, enabling a Z-scheme overall water splitting by coupling with a H-2-evolving photocatalyst (Rh-doped SrTiO3). It is found that the valence band maximum of Bi(4)NbO(8)Clis unusually high owing to highly dispersive O-2p orbitals (not Cl-3p orbitals), affording the narrow band gap and possibly the stability against water oxidation. This study suggests that a family of Sillen-Aurivillius perovskite oxyhalides is a promising system to allow a versatile band level tuning for establishing efficient and stable water splitting under visible light.
引用
收藏
页码:2082 / 2085
页数:4
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