Efficient Visible-Light-Driven Z-Scheme Overall Water Splitting Using a MgTa2O6-xNy/TaON Heterostructure Photocatalyst for H2 Evolution

被引：268

作者：

Chen, Shanshan ^{[1
,2
]}

Qi, Yu ^{[1
,2
]}

Hisatomi, Takashi ^{[3
]}

Ding, Qian ^{[1
,2
]}

Asai, Tomohiro ^{[3
]}

Li, Zheng ^{[1
,2
]}

Ma, Su Su Khine ^{[3
]}

Zhang, Fuxiang ^{[1
]}

Domen, Kazunari ^{[3
]}

Li, Can ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis,iChEM, Dalian 116023, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Tokyo, Sch Engn, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 29期

基金：

日本学术振兴会;

关键词：

heterostructures; hydrogen; overall water splitting; oxynitrides; photocatalysis; HYDROGEN EVOLUTION; OXIDATION; O-2; SEPARATION; OXYNITRIDE; METHANOL; PT/TIO2; TAON;

D O I：

10.1002/anie.201502686

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An (oxy)nitride-based heterostructure for powdered Z-scheme overall water splitting is presented. Compared with the single MgTa2O6-xNy or TaON photocatalyst, a MgTa2O6-xNy/TaON heterostructure fabricated by a simple one-pot nitridation route was demonstrated to effectively suppress the recombination of carriers by efficient spatial charge separation and decreased defect density. By employing Pt-loaded MgTa2O6-xNy/TaON as a H-2-evolving photocatalyst, a Z-scheme overall water splitting system with an apparent quantum efficiency (AQE) of 6.8% at 420 nm was constructed (PtOx-WO3 and IO3- /I- pairs were used as an O-2-evolving photocatalyst and a redox mediator, respectively), the activity of which is circa 7 or 360 times of that using Pt-TaON or Pt-MgTa2O6-xNy as a H-2-evolving photocatalyst, respectively. To the best of our knowledge, this is the highest AQE among the powdered Z-scheme overall water splitting systems ever reported.

引用

页码：8498 / 8501

页数：4

共 34 条

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