Facile synthesis of catalytically active CeO2 for soot combustion

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境纳米材料实验室

	Facile synthesis of catalytically active CeO2 for soot combustion
	Shen, Qun; Wu, Minfang; Wang, Hui; He, Chi; Hao, Zhengping; Wei, Wei; Sun, Yuhan
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2015-03-01
卷号	5 期号:3 页码:1941-1952
英文摘要	Pure ceria catalysts were prepared by a facile modified homogeneous co-precipitation method, and their catalytic performance was evaluated in the soot oxidation reaction. The structure and textural properties of the synthesized catalysts were characterized via XRD, N-2 adsorption/desorption, TG-DSC-MS, H-2-TPR, FE-SEM, HR-TEM and XPS techniques. It is shown that CeO2 samples prepared by the improved co-precipitation method exhibit obviously better catalytic activity than those prepared by the conventional co-precipitation method. The CeO2-CP4-F sample shows the best activity, for which the peak temperature, T-p, values of soot combustion are about 465 degrees C in O-2 stream gas and 430 degrees C in a NO/O-2 stream under soot/catalyst "loose contact" conditions. Moreover, after high temperature aging, the activity of CeO2-CP4-A becomes even better, for which the T-p value of soot combustion is lowered to 445 degrees C in O-2 air gas. The catalytic activity is not well associated with the physicochemical properties of BET surface area, particle size and reducibility at low temperatures. The number of lattice oxygen and its mobility in the series of CeO2 may be the crucial factor to decide the overall catalytic performance. According to the HRTEM result, the excellent migration of lattice oxygen may result from the preferential exposure of more-reactive planes, which may be the essential reason to explain the good performance of CeO2 catalysts in soot oxidation.
研究领域[WOS]	Chemistry, Physical
WOS记录号	WOS:000350685400063
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32707]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Shen, Qun,Wu, Minfang,Wang, Hui,et al. Facile synthesis of catalytically active CeO2 for soot combustion[J]. CATALYSIS SCIENCE & TECHNOLOGY,2015,5(3):1941-1952.
APA	Shen, Qun.,Wu, Minfang.,Wang, Hui.,He, Chi.,Hao, Zhengping.,...&Sun, Yuhan.(2015).Facile synthesis of catalytically active CeO2 for soot combustion.CATALYSIS SCIENCE & TECHNOLOGY,5(3),1941-1952.
MLA	Shen, Qun,et al."Facile synthesis of catalytically active CeO2 for soot combustion".CATALYSIS SCIENCE & TECHNOLOGY 5.3(2015):1941-1952.