Doping effect of Al2O3 and CeO2 on Fe2O3 support for gold catalyst in CO oxidation at low-temperature

	Doping effect of Al2O3 and CeO2 on Fe2O3 support for gold catalyst in CO oxidation at low-temperature
	Liu, Ruihui; Gao, Nansha; Zhen, Feng; Zhang, Yuyan; Mei, Lin; Zeng, Xiaowei
刊名	CHEMICAL ENGINEERING JOURNAL
	2013
英文摘要	Al2O3/CeO2 doped Fe2O3 support was synthesized by co-precipitation method, based on which gold was loaded by deposition-precipitation. Both the catalytic activity and thermal stability of the gold catalyst were enhanced significantly by Al2O3/CeO2 doping. The catalyst loaded with 1.0% Au and calcinedat 180 degrees C converted CO completely at -8.9 degrees C, while the sample modified by Al2O3/CeO2 showed a 100% CO conversion at -20.1 degrees C. Characterization techniques, such as N-2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopic (TEM), thermogravimetry-differential scanning calorimeter (TG-DSC) and CO2 temperature programmed desorption (CO2-TPD) were employed to investigate the structure and surface morphologyof the catalysts. Al2O3/CeO2 doping retarded the mesoporous structures of the catalysts from collapse during the calcination at high temperature, which thus maintained higher specific surface area and lower pore size. After being calcined at 500 degrees C, the average diameter of the gold particles in Au/Fe2O3 was 7.0 nm and the sizes of support grains ranged from 50 to 100 nm. However, the average diameter of the gold particles in Au/Al2O3/CeO2/Fe2O3 was only 5.1 nm and the sizes of support grains ranged from 10 to 30 nm. Gold loaded on the Fe2O3 support by the doping of Al2O3/CeO2 have better catalytic activity forCO oxidation. Crown Copyright (c) 2013 Published by Elsevier B.V. All rights reserved.
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1385894713004543
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/5195]
专题	深圳先进技术研究院_医药所
作者单位	CHEMICAL ENGINEERING JOURNAL
推荐引用方式 GB/T 7714	Liu, Ruihui,Gao, Nansha,Zhen, Feng,et al. Doping effect of Al2O3 and CeO2 on Fe2O3 support for gold catalyst in CO oxidation at low-temperature[J]. CHEMICAL ENGINEERING JOURNAL,2013.
APA	Liu, Ruihui,Gao, Nansha,Zhen, Feng,Zhang, Yuyan,Mei, Lin,&Zeng, Xiaowei.(2013).Doping effect of Al2O3 and CeO2 on Fe2O3 support for gold catalyst in CO oxidation at low-temperature.CHEMICAL ENGINEERING JOURNAL.
MLA	Liu, Ruihui,et al."Doping effect of Al2O3 and CeO2 on Fe2O3 support for gold catalyst in CO oxidation at low-temperature".CHEMICAL ENGINEERING JOURNAL (2013).