Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics

doi:10.1002/adma.202202072

IMR OpenIR

	Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics
	Ren, Zhaohui 1,2; Ruan, Luoyuan 1,3; Yin, Lichang 4; Akkiraju, Karthik 5; Giordano, Livia 6; Liu, Zhongran 7; Li, Shi 1; Ye, Zixing 1; Li, Songda 1; Yang, Hangsheng 1; Wang, Yong 7; Tian, He 7,8; Liu, Gang 4; Shao-Horn, Yang 5; Han, Gaorong 1
通讯作者	Tian, 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
发表期刊	ADVANCED MATERIALS
ISSN	0935-9648
页码	9
摘要	Surface 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.
关键词	ferroelectrics polarization screening surface oxygen vacancies tunable oxidation reaction
资助者	National 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
DOI	10.1002/adma.202202072
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000815012700001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174763
专题	中国科学院金属研究所
通讯作者	Tian, He; Liu, Gang; Shao-Horn, Yang; Han, Gaorong
作者单位	1.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
推荐引用方式 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.