Enhanced thermal stability and oxygen storage capacity of ceria-zirconia prepared by flame spray pyrolysis under high temperature
文献类型：期刊论文
| 作者 | Zhao, Feng2; Li, Shuangde2; Chen, Yunfa1,2,3 |
| 刊名 | Journal of Solid State Chemistry
 |
| 出版日期 | 2021-08-01 |
| 卷号 | 300 |
| 关键词 | Cerium oxide - Zirconium - Organic solvents - X ray photoelectron spectroscopy - Oxygen vacancies - Carboxylic acids - Scanning electron microscopy - Temperature programmed desorption - Ethanol - Zirconia |
| ISSN号 | 224596 |
| DOI | 10.1016/j.jssc.2021.122216 |
| 英文摘要 | Ceria zirconia solid solution with high oxygen storage capacity (OSC) and thermal stability under 1000 掳C is quite important for support materials in three-way catalysts (TWCs). In this work, Ce1-xZrxO2 with different Zr dopants (x = 0, 0.125, 0.250 and 0.375) have been prepared by ame spray pyrolysis (FSP) with carboxylic acid or ethanol and carboxylic acid (v:v 1:4) solvents. The inuences of Zr content and the addition of ethanol into carboxylic acid on the OSC performance and thermal stability have been systematically characterized by X-ray diffraction (XRD), N2 adsorption-desorption, Raman analysis, field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS), hydrogen-temperature programmed reduction (H2-TPR), and pulse thermal analysis using H2 as reducing agent. The presence of cubic-tetragonal interfaces in the Ce0.750Zr0.250O2 sample can enhance the formation of oxygen vacancies and the mobility of lattice oxygen in ceria-zirconia solutions, which results in the largest OSC (349 渭mol g鈭?) among the fresh samples. The cubic-tetragonal interfaces in the Ce0.750Zr0.250O2 sample can also promote the thermal stability under 1000 掳C to preserve better OSC (202 渭mol g鈭?) than other aged samples. Furthermore, after adding with ethanol into carboxylic acid solvent, the OSC of the sample further increases to 371 渭mol g鈭? for the increment of oxygen vacancy concentration. It is worthy to note that the introduction of ethanol can suppress Zr migration from the lattice to the surface of CeO2 at high temperature, further enhancing OSC (240 渭mol g鈭?) and thermal stability. 漏 2021 Elsevier Inc. |
| 学科主题 | Thermodynamic Stability |
| 项目编号 | This research described above was financially supported by the National Key R&D Program of China (2016YFC0204903), the Strategic Priority Research Program (A) of the Chinese Academy of Sciences (XDA23030300), and the Young Talent Project of the Center for Excellence in Regional Atmospheric Environment, CAS (CERAE201805).This research described above was financially supported by the National Key R&D Program of China ( 2016YFC0204903 ), the Strategic Priority Research Program (A) of the Chinese Academy of Sciences ( XDA23030300 ), and the Young Talent Project of the Center for Excellence in Regional Atmospheric Environment , CAS ( CERAE201805 ). |
| 出版者 | Academic Press Inc. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60306]  |
| 作者单位 | 1.Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China 2.State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 3.University of Chinese Academy of Sciences, Beijing; 100049, China |
| 推荐引用方式 GB/T 7714 | Zhao, Feng,Li, Shuangde,Chen, Yunfa. Enhanced thermal stability and oxygen storage capacity of ceria-zirconia prepared by flame spray pyrolysis under high temperature[J]. Journal of Solid State Chemistry,2021,300. |
| APA | Zhao, Feng,Li, Shuangde,&Chen, Yunfa.(2021).Enhanced thermal stability and oxygen storage capacity of ceria-zirconia prepared by flame spray pyrolysis under high temperature.Journal of Solid State Chemistry,300. |
| MLA | Zhao, Feng,et al."Enhanced thermal stability and oxygen storage capacity of ceria-zirconia prepared by flame spray pyrolysis under high temperature".Journal of Solid State Chemistry 300(2021). |
入库方式： OAI收割
来源：过程工程研究所
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