A novel route for synthesis of α-Fe2O3–CeO2 nanocomposites for ethanol conversion
详细信息 查看全文
- 作者：Heba M. Gobara ; Wael A. Aboutaleb ; Karam M. Hashem…
- 刊名：Journal of Materials Science
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：52
- 期：1
- 页码：550-568
- 全文大小：2,621 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Materials Science
Characterization and Evaluation Materials
Polymer Sciences
Continuum Mechanics and Mechanics of Materials
Crystallography
Mechanics - 出版者：Springer Netherlands
- ISSN：1573-4803
- 卷排序：52
文摘
In this study, a series of α-Fe2O3–CeO2 nanocomposites containing 5, 15, 30, and 50 % Fe as well as the pure oxides, α-Fe2O3 and CeO2, were synthesized by a novel route of auto-combustion method at temperatures lower than those reported previously. The as-synthesized catalysts were characterized by several techniques such as XRD, XRF, N2 physisorption, DSC/TGA, NH3-TPD, TEM, and EDX. The catalytic activity of the synthesized nanocomposites was examined under ethanol conversion. The results revealed that the solid-solution formation was established for all the Fe-substituted CeO2 samples while maintaining the fluorite structure of ceria. Only a hardly noticeable segregation of α-Fe2O3 was appreciated for the catalyst samples with higher iron content (30 and 50 wt% Fe). The results confirmed that the adopted auto-combustion method allowed a good control of the chemical composition of the prepared composites with the proper structural and textural characteristics. The 30 % Fe–Ce sample was the most active and selective catalyst toward ethylene production compared with the other samples under study, owing to the pronounced Brönsted acid sites. The overall data collected through this work revealed that the synthesized nanocomposites are promising candidates for the production of ethylene from ethanol.