Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics
文献类型：期刊论文
| 作者 | Ren, Zhaohui7,8; Ruan, Luoyuan6,8; Yin, Lichang5; Akkiraju, Karthik1; Giordano, Livia4; Liu, Zhongran3; Li, Shi8; Ye, Zixing8; Li, Songda8; Yang, Hangsheng8 |
| 刊名 | ADVANCED MATERIALS
 |
| 出版日期 | 2022-06-24 |
| 页码 | 9 |
| ISSN号 | 0935-9648 |
| 关键词 | ferroelectrics polarization screening surface oxygen vacancies tunable oxidation reaction |
| DOI | 10.1002/adma.202202072 |
| 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) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| WOS记录号 | WOS:000815012700001 |
| 资助机构 | 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 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/174762]  |
| 专题 | 金属研究所_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.MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA 2.Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450052, Peoples R China 3.Zhejiang Univ, Sch Mat Sci & Engn, Ctr Electron Microscopy, Hangzhou 310027, Peoples R China 4.MIT, Res Lab Elect, Cambridge, MA 02139 USA 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Zhejiang Lab, Res Ctr Sensing Mat & Devices, Hangzhou 311121, Peoples R China 7.Zhejiang Lab, Res Ctr Intelligent Sensing, Hangzhou 311100, Peoples R China 8.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, 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. |
入库方式： OAI收割
来源：金属研究所
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