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Understanding oxygen vacancies in disorder-engineered surface and subsurface of CaTiO3 nanosheets on photocatalytic hydrogen evolution
Cai, JM; Cao, A; Huang, JJ; Jin, WF; Zhang, J; Jiang, Z; Li, XG
2020
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume267Pages:-
Subtype期刊论文
AbstractHydrogenation-induced surface disorder on semiconductors has been proved an efficient strategy in photocatalysis, but identification and understanding of surface and subsurface disordered layers from molecular level viewpoints are still unclear. Herein, we fabricate efficient disorder-engineered CaTiO3 nanosheets photocatalysts and illustrate functions of surface and subsurface oxygen vacancies on photocatalytic hydrogen evolution. Our experimental and theoretical results reveal that subsurface oxygen vacancies can change energy band structure of CaTiO3 to form band tail states, improving charge separation; and surface oxygen vacancies can act as active centers to facilitate H-2 formation. Both merits promote similar to 49 times of the hydrogen evolution rate than pristine CaTiO3. In addition, we discover that improving charge separation with subsurface oxygen vacancies is more important than promoting surface reactions with surface oxygen vacancies in defect-engineered photocatalysts. Our work provides new insights into the hydrogenated disordered surface layer, as well as the rational design of photocatalysts with defect-engineering strategies.
KeywordBLACK TIO2 EFFICIENT NANOPARTICLES WATER NICKEL DEGRADATION COMPOSITES GRAPHENE CATALYST DEFECTS
DOI10.1016/j.apcatb.2019.118378
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33247
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin Key Lab Appl Catalysis Sci & Engn, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
2.Westlake Univ, Westlake Inst Adv Study, Hangzhou 310024, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China
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Cai, JM,Cao, A,Huang, JJ,et al. Understanding oxygen vacancies in disorder-engineered surface and subsurface of CaTiO3 nanosheets on photocatalytic hydrogen evolution[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,267:-.
APA Cai, JM.,Cao, A.,Huang, JJ.,Jin, WF.,Zhang, J.,...&Li, XG.(2020).Understanding oxygen vacancies in disorder-engineered surface and subsurface of CaTiO3 nanosheets on photocatalytic hydrogen evolution.APPLIED CATALYSIS B-ENVIRONMENTAL,267,-.
MLA Cai, JM,et al."Understanding oxygen vacancies in disorder-engineered surface and subsurface of CaTiO3 nanosheets on photocatalytic hydrogen evolution".APPLIED CATALYSIS B-ENVIRONMENTAL 267(2020):-.
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