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题名: Efficient Visible-Light-Driven Z-Scheme Overall Water Splitting Using a MgTa2O6-xNy/TaON Heterostructure Photocatalyst for H-2 Evolution
作者: Chen, Shanshan1, 2;  Qi, Yu1, 2;  Hisatomi, Takashi3;  Ding, Qian1, 2;  Asai, Tomohiro3;  Li, Zheng1, 2;  Ma, Su Su Khine3;  Zhang, Fuxiang1;  Domen, Kazunari3;  Li, Can1
关键词: heterostructures ;  hydrogen ;  overall water splitting ;  oxynitrides ;  photocatalysis
刊名: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
发表日期: 2015-07-13
DOI: 10.1002/anie.201502686
卷: 54, 期:29, 页:8498-8501
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: 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.
关键词[WOS]: SHUTTLE REDOX MEDIATOR ;  HYDROGEN EVOLUTION ;  IRRADIATION ;  OXIDATION ;  O-2 ;  SEMICONDUCTORS ;  SPECTROSCOPY ;  SEPARATION ;  OXYNITRIDE ;  REDUCTION
语种: 英语
WOS记录号: WOS:000358050300034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146401
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 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

Recommended Citation:
Chen, Shanshan,Qi, Yu,Hisatomi, Takashi,et al. Efficient Visible-Light-Driven Z-Scheme Overall Water Splitting Using a MgTa2O6-xNy/TaON Heterostructure Photocatalyst for H-2 Evolution[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2015,54(29):8498-8501.
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