DICP OpenIR
Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation
Xiong, Feng-Qiang1; Wan, Lipeng1; Li, Yue1; Thomas, Tiju2; DiSalvo, Francis J.3; Yang, Minghui1
KeywordAmmonolysis Oxidation Oxynitrides Perovskite Phases Photocatalysis
Source PublicationCHEMSUSCHEM
2017-03-09
ISSN1864-5631
DOI10.1002/cssc.201601602
Volume10Issue:5Pages:930-937
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordVISIBLE-LIGHT-IRRADIATION ; CHLORIDE FLUX GROWTH ; HYDROGEN EVOLUTION ; NITRIDATION ; EFFICIENCY ; CRYSTALS ; KINETICS ; LAYER ; ESR ; NH3
AbstractLaTiO2N photocatalysts were prepared by thermal ammonolysis of flux-synthesized La2Ti2O7 and La2TiO5, and were investigated for water oxidation. Though LaTiO2N derived from La2TiO5 appears defect-free by UV/Vis/near-IR and electron paramagnetic resonance (EPR) spectroscopy, its performance is much lower than that of conventional La2Ti2O7-derived LaTiO2N with defects. It is shown by Mott-Schottky analysis that La2TiO5-derived LaTiO2N has significantly lower donor density; this can result in insufficient built-in electric field for the separation of photogenerated electrons and holes. The lower donor density is also consistent with the smaller difference between the Fermi level and the valence-band maximum, which accounts for a lower oxidative power of the holes. In light of this discovery, the donor density was increased substantially by introducing anion vacancies through annealing in Ar. This resulted in improved performance. The CoOx-assisted La(2)TiO(5-)derived LaTiO2N annealed at 713 degrees C has a higher quantum efficiency (25%) at 450 nm than high-performance conventional CoOx/LaTiO2N (21%).
Language英语
WOS IDWOS:000398182300015
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169331
Collection中国科学院大连化学物理研究所
Corresponding AuthorDiSalvo, Francis J.; Yang, Minghui
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
3.Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA
Recommended Citation
GB/T 7714
Xiong, Feng-Qiang,Wan, Lipeng,Li, Yue,et al. Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation[J]. CHEMSUSCHEM,2017,10(5):930-937.
APA Xiong, Feng-Qiang,Wan, Lipeng,Li, Yue,Thomas, Tiju,DiSalvo, Francis J.,&Yang, Minghui.(2017).Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation.CHEMSUSCHEM,10(5),930-937.
MLA Xiong, Feng-Qiang,et al."Crucial Role of Donor Density in the Performance of Oxynitride Perovskite LaTiO2N for Photocatalytic Water Oxidation".CHEMSUSCHEM 10.5(2017):930-937.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xiong, Feng-Qiang]'s Articles
[Wan, Lipeng]'s Articles
[Li, Yue]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xiong, Feng-Qiang]'s Articles
[Wan, Lipeng]'s Articles
[Li, Yue]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xiong, Feng-Qiang]'s Articles
[Wan, Lipeng]'s Articles
[Li, Yue]'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.