Comparative Study of CeO2 and Doped CeO2 with Tailored Oxygen Vacancies for CO Oxidation
文献类型：期刊论文
| 作者 | Wang, Zhen1; Wang, Qi2; Liao, Yuchao1; Shen, Genli1; Gong, Xuzhong; Han, Ning1; Liu, Haidi1; Chen, Yunfa1
|
| 刊名 | CHEMPHYSCHEM
 |
| 出版日期 | 2011-10-24 |
| 卷号 | 12期号:15页码:2763-2770 |
| 关键词 | ceria CO oxidation doping gadolinium samarium |
| ISSN号 | 1439-4235 |
| 其他题名 | ChemPhysChem |
| 中文摘要 | 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. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| 研究领域[WOS] | Chemistry ; Physics |
| 关键词[WOS] | ENHANCED CATALYTIC-ACTIVITY ; CERIUM OXIDE NANOPARTICLES ; SOLID-SOLUTIONS ; STRUCTURAL CHARACTERISTICS ; ELECTRONIC-STRUCTURE ; RAMAN-SPECTRA ; NANORODS ; BEHAVIOR ; FILMS ; SIZE |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000297017600014 |
| 公开日期 | 2013-11-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6281]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：过程工程研究所
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