Knowledge Management System Of Institute of process engineering,CAS
| Comparative Study of CeO2 and Doped CeO2 with Tailored Oxygen Vacancies for CO Oxidation | |
| Alternative Title | ChemPhysChem |
Wang, Zhen1; Wang, Qi2; Liao, Yuchao1; Shen, Genli1; Gong, Xuzhong; Han, Ning1; Liu, Haidi1; Chen, Yunfa1
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| 2011-10-24 | |
| Source Publication | CHEMPHYSCHEM
 |
| ISSN | 1439-4235 |
| Volume | 12Issue:15Pages:2763-2770 |
| Abstract | We report on the preparation and characterization of CeO2 nanofibers (CeO2-NFs) and nanocubes (CeO2-NCs), as well as Sm-and Gd-doped CeO2 nanocubes (Sm-CeO2-NCs and Gd-CeO2-NCs), synthesized by a simple hydrothermal process for CO catalytic oxidation. The samples were characterized by Xray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Raman spectroscopy, and photoluminescence spectroscopy. Their oxygen-storing capacity (OSC) was examined by means of hydrogen temperature-programmed reduction (H-2-TPR) and oxygen pulse techniques. Their catalytic properties for CO catalytic oxidation were comparatively investigated. The results showed that the CeO2-NFs possessed a higher catalytic activity compared to the CeO2-NCs because of their smaller size and the greater number of oxygen vacancies. The activity of the Sm-CeO2-NCs was higher than that of the CeO2-NCs due to an increase in the number of oxygen vacancies, which results from the substitution of Ce4+ species with Sm3+ ions. In contrast, Gd doping had a negative effect on the CO catalytic oxidation due to the special electron configuration of Gd3+ (4f(7)). Our work demonstrates that the oxygen vacancies in pure CeO2 and the electron configuration of the dopants in doped CeO2 play an important role in CO oxidation.; We report on the preparation and characterization of CeO2 nanofibers (CeO2-NFs) and nanocubes (CeO2-NCs), as well as Sm-and Gd-doped CeO2 nanocubes (Sm-CeO2-NCs and Gd-CeO2-NCs), synthesized by a simple hydrothermal process for CO catalytic oxidation. The samples were characterized by Xray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Raman spectroscopy, and photoluminescence spectroscopy. Their oxygen-storing capacity (OSC) was examined by means of hydrogen temperature-programmed reduction (H-2-TPR) and oxygen pulse techniques. Their catalytic properties for CO catalytic oxidation were comparatively investigated. The results showed that the CeO2-NFs possessed a higher catalytic activity compared to the CeO2-NCs because of their smaller size and the greater number of oxygen vacancies. The activity of the Sm-CeO2-NCs was higher than that of the CeO2-NCs due to an increase in the number of oxygen vacancies, which results from the substitution of Ce4+ species with Sm3+ ions. In contrast, Gd doping had a negative effect on the CO catalytic oxidation due to the special electron configuration of Gd3+ (4f(7)). Our work demonstrates that the oxygen vacancies in pure CeO2 and the electron configuration of the dopants in doped CeO2 play an important role in CO oxidation. |
| Keyword | Ceria Co Oxidation Doping Gadolinium Samarium |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1002/cphc.201100346 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | ENHANCED CATALYTIC-ACTIVITY ; CERIUM OXIDE NANOPARTICLES ; SOLID-SOLUTIONS ; STRUCTURAL CHARACTERISTICS ; ELECTRONIC-STRUCTURE ; RAMAN-SPECTRA ; NANORODS ; BEHAVIOR ; FILMS ; SIZE |
| WOS Research Area | Chemistry ; Physics |
| WOS Subject | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| WOS ID | WOS:000297017600014 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/6281 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Grad Univ, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China 2.Natl Ctr Nanosci & Technol, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Zhen,Wang, Qi,Liao, Yuchao,et al. Comparative Study of CeO2 and Doped CeO2 with Tailored Oxygen Vacancies for CO Oxidation[J]. CHEMPHYSCHEM,2011,12(15):2763-2770. |
| APA | Wang, Zhen.,Wang, Qi.,Liao, Yuchao.,Shen, Genli.,Gong, Xuzhong.,...&Chen, Yunfa.(2011).Comparative Study of CeO2 and Doped CeO2 with Tailored Oxygen Vacancies for CO Oxidation.CHEMPHYSCHEM,12(15),2763-2770. |
| MLA | Wang, Zhen,et al."Comparative Study of CeO2 and Doped CeO2 with Tailored Oxygen Vacancies for CO Oxidation".CHEMPHYSCHEM 12.15(2011):2763-2770. |
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| File Name/Size | DocType | Version | Access | License | ||
| Comparative Study of（975KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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