Understanding oxygen vacancies in disorder-engineered surface and subsurface of CaTiO3 nanosheets on photocatalytic hydrogen evolution

doi:10.1016/j.apcatb.2019.118378

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	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
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020
卷号	267 页码:-
关键词	BLACK TIO2 EFFICIENT NANOPARTICLES WATER NICKEL DEGRADATION COMPOSITES GRAPHENE CATALYST DEFECTS
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2019.118378
文献子类	期刊论文
英文摘要	Hydrogenation-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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/33247]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Westlake Univ, Westlake Inst Adv Study, Hangzhou 310024, Peoples R China 2.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 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
推荐引用方式 GB/T 7714	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):-.