CAS OpenIR  > 研究所(批量导入)
The effect of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals
Alternative TitleJ. Mater. Chem. A
Yu, Xuelian1,2; An, Xiaoqiang3; Shavel, Alexey1; Ibanez, Maria1; Cabot, Andreu1,4
2014
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume2Issue:31Pages:12317-12322
AbstractWe report on the photocatalytic hydrogen evolution under full-arc light irradiation of CuIn1-xGaxS2 wurtzite nanocrystals in the presence of SO32- and S2- as sacrificial reagents. We analyzed the hydrogen generation rate as a function of the Ga content and associated it with the energy band positions. For photocatalytic water splitting, the CuInS2 bandgap is slightly too low to efficiently overcome the reaction over-potential. The presence of Ga shifts up the CuInS2 conduction band edge providing a larger driving force for photogenerated carriers to activate the water splitting reduction reaction. The larger the Ga content, the more energetically favorable the electron injection, and thus a more efficient use of the photogenerated carriers is reached. However, the band gap increase associated with the Ga incorporation reduces the concentration of photogenerated carriers available for water splitting, and consequently a lower hydrogen conversion rate is obtained for very high Ga contents. The optimum Ga concentration was experimentally found at CuIn0.3Ga0.7S2.; We report on the photocatalytic hydrogen evolution under full-arc light irradiation of CuIn1-xGaxS2 wurtzite nanocrystals in the presence of SO32- and S2- as sacrificial reagents. We analyzed the hydrogen generation rate as a function of the Ga content and associated it with the energy band positions. For photocatalytic water splitting, the CuInS2 bandgap is slightly too low to efficiently overcome the reaction over-potential. The presence of Ga shifts up the CuInS2 conduction band edge providing a larger driving force for photogenerated carriers to activate the water splitting reduction reaction. The larger the Ga content, the more energetically favorable the electron injection, and thus a more efficient use of the photogenerated carriers is reached. However, the band gap increase associated with the Ga incorporation reduces the concentration of photogenerated carriers available for water splitting, and consequently a lower hydrogen conversion rate is obtained for very high Ga contents. The optimum Ga concentration was experimentally found at CuIn0.3Ga0.7S2.
KeywordQuaternary Chalcogenide Nanocrystals Solar-cells Photoelectrochemical Characterization Semiconducting Photoelectrodes Thermoelectric Properties Splitting Water Thin-films Generation Efficiency Nanorods
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c4ta01315h
URL查看原文
Indexed BySCI
Language英语
WOS KeywordQUATERNARY CHALCOGENIDE NANOCRYSTALS ; SOLAR-CELLS ; THERMOELECTRIC PROPERTIES ; PHOTOELECTROCHEMICAL CHARACTERIZATION ; SEMICONDUCTING PHOTOELECTRODES ; SPLITTING WATER ; THIN-FILMS ; GENERATION ; EFFICIENCY ; NANORODS
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000339625500027
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11018
Collection研究所(批量导入)
Affiliation1.Catalonia Energy Res Inst IREC, Barcelona 08930, Spain
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
3.UCL, Dept Chem Engn, London WC1E 7JE, England
4.ICREA, Barcelona 08010, Spain
Recommended Citation
GB/T 7714
Yu, Xuelian,An, Xiaoqiang,Shavel, Alexey,et al. The effect of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(31):12317-12322.
APA Yu, Xuelian,An, Xiaoqiang,Shavel, Alexey,Ibanez, Maria,&Cabot, Andreu.(2014).The effect of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals.JOURNAL OF MATERIALS CHEMISTRY A,2(31),12317-12322.
MLA Yu, Xuelian,et al."The effect of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals".JOURNAL OF MATERIALS CHEMISTRY A 2.31(2014):12317-12322.
Files in This Item:
File Name/Size DocType Version Access License
The effect of the Ga(801KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yu, Xuelian]'s Articles
[An, Xiaoqiang]'s Articles
[Shavel, Alexey]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yu, Xuelian]'s Articles
[An, Xiaoqiang]'s Articles
[Shavel, Alexey]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yu, Xuelian]'s Articles
[An, Xiaoqiang]'s Articles
[Shavel, Alexey]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.