Finely Tuned Structure and Catalytic Performance of Cerium Oxides by a Continuous Samarium Doping from 0 to 100%
文献类型：期刊论文
| 作者 | Tao, R; Xu, JS; Zhong, H; Wen, W; Pan, QF; Liu, Y; Chen, J |
| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2019 |
| 卷号 | 58期号:19页码:13066-13076 |
| 关键词 | GD-DOPED CERIA X-RAY-DIFFRACTION ALCOHOL ELECTROOXIDATION RAMAN-SPECTRA CEO2 NANOPARTICLES EVOLUTION DEFECTS STABILITY ARRAYS |
| ISSN号 | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.9b01979 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Cerium oxides are prevalent catalytic materials, and the lanthanide-doped ceria have attracted special interest since it is easy to tune the concentration of oxygen vacancies (V-O) by changing the doping content. The presence of V-O is generally believed to favor a catalytic reaction, but the formation of dopant-vacancy associations at a high doping concentration might produce an adverse effect. Herein, evolutions of the structural properties and catalytic performances in Sm-doped ceria (SmxCe1-xO2-delta, x = 0-1) are investigated to explore the doping effect of Sm3+ on the ceria-based nanoctrystals. The SmxCe1-xO2-delta films composed of nanoctrystals are elaborately prepared via electrodeposition under mild conditions to prevent phase separation. A combination of studies, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman, photoluminescence (PL), and methanol electro-oxidation (MEO) reaction, reveals that variation trends for the V-O concentration and catalytic property of SmxCe1-xO2-delta are unsynchronized. The lattice structures of SmxCe1-xO2-delta nanoctrystals undergo a smooth and steady transition from F-type (fluorite CeO2) to C-type (cubic Sm2O3) with the increase of Sm3+ contents. The structural transition occurs in the Sm3+ concentration range of 64-84%, within which the V-O concentration reaches the maximum as well. However, the optimal MEO performance is obtained at a relatively lower doping concentration of 24%. Above this concentration, significant dopant-vacancy associates are observed by XRD, Raman, and PL characterizations. It is inferred that, for these ceria-based nanocrystals, the dopant-vacancy association induced by high doping would impede the growth of catalytic performance despite all the benefits of V-O. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32060]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Sci & Technol Surface Phys & Chem Lab, Jiangyou 621907, Sichuan, Peoples R China; 2.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China; 3.China Acad Engn Phys, Inst Mat, Mianyang 621908, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tao, R,Xu, JS,Zhong, H,et al. Finely Tuned Structure and Catalytic Performance of Cerium Oxides by a Continuous Samarium Doping from 0 to 100%[J]. INORGANIC CHEMISTRY,2019,58(19):13066-13076. |
| APA | Tao, R.,Xu, JS.,Zhong, H.,Wen, W.,Pan, QF.,...&Chen, J.(2019).Finely Tuned Structure and Catalytic Performance of Cerium Oxides by a Continuous Samarium Doping from 0 to 100%.INORGANIC CHEMISTRY,58(19),13066-13076. |
| MLA | Tao, R,et al."Finely Tuned Structure and Catalytic Performance of Cerium Oxides by a Continuous Samarium Doping from 0 to 100%".INORGANIC CHEMISTRY 58.19(2019):13066-13076. |
入库方式： OAI收割
来源：上海应用物理研究所
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