The smart surface modification of Fe2O3 by WOx for significantly promoting the selective catalytic reduction of NOx with NH3

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	The smart surface modification of Fe2O3 by WOx for significantly promoting the selective catalytic reduction of NOx with NH3
	Liu, Fudong; Shan, Wenpo; Lian, Zhihua; Liu, Jingjing; He, Hong
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018-08-15
卷号	230 页码:165-176
关键词	Fe-based catalyst Surface modification Selective catalytic reduction Nitrogen oxides abatement Diesel engines
ISSN号	0926-3373
文献子类	Article
英文摘要	The deposition of WOx species using conventional impregnation method is a very simple and efficient way to adjust the surface acidity and redox ability of hematite Fe2O3 simultaneously, significantly improving its catalytic activity and N-2 selectivity for the selective catalytic reduction of NOx with NH3 (NH3-SCR). The deposited WOx species on Fe2O3 surface was in highly unsaturated coordination state acting as an effective surface modifier. Through the electronic inductive effect in W-O-Fe bonds, the oxidation ability of surface Fe(3+delta)+ species was well increased, yet the over-oxidation of NH3 on bulk Fe2O3 was significantly suppressed, which was quite beneficial to the improvement of NH3-SCR activity and N-2 selectivity simultaneously. Besides, the deposited WOx species could also supply abundant surface reactive Lewis and Bronsted acid sites for NH3 adsorption and activation during the SCR reaction. The NH3-SCR process on this WOx/Fe2O3 catalyst mainly followed an Eley-Rideal (E-R) reaction pathway between gaseous NO and active NH3 adsorbed species, which was the main reason for its superior SO2 resistance. This opens a new route for the preparation of highly efficient, selective, cost effective and SO2 resistant NH3-SCR catalysts for the deNO(x) process on diesel engines.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40842]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Liu, Fudong,Shan, Wenpo,Lian, Zhihua,et al. The smart surface modification of Fe2O3 by WOx for significantly promoting the selective catalytic reduction of NOx with NH3[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,230:165-176.
APA	Liu, Fudong,Shan, Wenpo,Lian, Zhihua,Liu, Jingjing,&He, Hong.(2018).The smart surface modification of Fe2O3 by WOx for significantly promoting the selective catalytic reduction of NOx with NH3.APPLIED CATALYSIS B-ENVIRONMENTAL,230,165-176.
MLA	Liu, Fudong,et al."The smart surface modification of Fe2O3 by WOx for significantly promoting the selective catalytic reduction of NOx with NH3".APPLIED CATALYSIS B-ENVIRONMENTAL 230(2018):165-176.