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Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics
Ren, Zhaohui1,2; Ruan, Luoyuan1,3; Yin, Lichang4; Akkiraju, Karthik5; Giordano, Livia6; Liu, Zhongran7; Li, Shi1; Ye, Zixing1; Li, Songda1; Yang, Hangsheng1; Wang, Yong7; Tian, He7,8; Liu, Gang4; Shao-Horn, Yang5; Han, Gaorong1
Corresponding AuthorTian, He(hetian@zju.edu.cn) ; Liu, Gang(gangliu@imr.ac.cn) ; Shao-Horn, Yang(shaohorn@mit.edu) ; Han, Gaorong(hgr@zju.edu.cn)
2022-06-24
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Pages9
AbstractSurface oxygen vacancies have been widely discussed to be crucial for tailoring the activity of various chemical reactions from CO, NO, to water oxidation by using oxide-supported catalysts. However, the real role and potential function of surface oxygen vacancies in the reaction remains unclear because of their very short lifetime. Here, it is reported that surface oxygen vacancies can be well confined electrostatically for a polarization screening near the perimeter interface between Pt {111} nanocrystals and the negative polar surface (001) of ferroelectric PbTiO3. Strikingly, such a catalyst demonstrates a tunable catalytic CO oxidation kinetics from 200 degrees C to near room temperature by increasing the O-2 gas pressure, accompanied by the conversion curve from a hysteresis-free loop to one with hysteresis. The combination of reaction kinetics, electronic energy loss spectroscopy (EELS) analysis, and density functional theory (DFT) calculations, indicates that the oxygen vacancies stabilized by the negative polar surface are the active sites for O-2 adsorption as a rate-determining step, and then dissociated O moves to the surface of the Pt nanocrystals for oxidizing adsorbed CO. The results open a new pathway for tunable catalytic activity of CO oxidation.
Keywordferroelectrics polarization screening surface oxygen vacancies tunable oxidation reaction
Funding OrganizationNational Key R & D Program of China ; Natural Science Foundation of Zhejiang Province, China ; Natural Science Foundation of China ; Key R&D Program of Zhejiang Province ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation ; Research Project of Zhejiang Lab
DOI10.1002/adma.202202072
Indexed BySCI
Language英语
Funding ProjectNational Key R & D Program of China[2021YFA1500800] ; Natural Science Foundation of Zhejiang Province, China[LR21E020004] ; Natural Science Foundation of China[51825204] ; Natural Science Foundation of China[21633009] ; Natural Science Foundation of China[U1909212] ; Key R&D Program of Zhejiang Province[2020C01124] ; Fundamental Research Funds for the Central Universities[K20200056] ; National Natural Science Foundation of China[12125407] ; National Natural Science Foundation of China[52025011] ; Zhejiang Provincial Natural Science Foundation[LD21E020002] ; Research Project of Zhejiang Lab[2022MF0AL02]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000815012700001
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174763
Collection中国科学院金属研究所
Corresponding AuthorTian, He; Liu, Gang; Shao-Horn, Yang; Han, Gaorong
Affiliation1.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
2.Zhejiang Lab, Res Ctr Intelligent Sensing, Hangzhou 311100, Peoples R China
3.Zhejiang Lab, Res Ctr Sensing Mat & Devices, Hangzhou 311121, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
5.MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
6.MIT, Res Lab Elect, Cambridge, MA 02139 USA
7.Zhejiang Univ, Sch Mat Sci & Engn, Ctr Electron Microscopy, Hangzhou 310027, Peoples R China
8.Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450052, Peoples R China
Recommended Citation
GB/T 7714
Ren, Zhaohui,Ruan, Luoyuan,Yin, Lichang,et al. Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics[J]. ADVANCED MATERIALS,2022:9.
APA Ren, Zhaohui.,Ruan, Luoyuan.,Yin, Lichang.,Akkiraju, Karthik.,Giordano, Livia.,...&Han, Gaorong.(2022).Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics.ADVANCED MATERIALS,9.
MLA Ren, Zhaohui,et al."Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics".ADVANCED MATERIALS (2022):9.
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