Promoting effect of Nd on the reduction of NO with NH3 over CeO2   supported by activated semi-coke: an in situ DRIFTS study

doi:10.1039/c4cy01577k

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	Promoting effect of Nd on the reduction of NO with NH3 over CeO2 supported by activated semi-coke: an in situ DRIFTS study
	Chen, Yan ; Wang, Jinping ; Yan, Zheng ; Liu, Lili ; Zhang, Zuotai ; Wang, Xidong
刊名	catalysis science technology
	2015
关键词	SELECTIVE CATALYTIC-REDUCTION LOW-TEMPERATURE NH3-SCR MN-CE/TIO2 CATALYST CEO2-TIO2 CATALYST CEO2/TIO2 CATALYST OXIDE CATALYST NITRIC-OXIDE AMMONIA SCR MECHANISM
DOI	10.1039/c4cy01577k
英文摘要	Cerium oxides and neodymium-cerium composite oxides were loaded onto activated semi-coke (ASC) by a hydrothermal method for the selective catalytic reduction (SCR) of NO with NH3. The catalytic activity of CeO2/ASC was greatly enhanced by the addition of Nd. The mechanistic cause of the promoting effect of Nd was systematically investigated using various characterization techniques, including XRD, SEM, TEM and in situ DRIFTS. The results revealed that the reaction route for NH3-SCR followed both the E-R and L-H mechanisms over CeO2/ASC and CeO2-Nd/ASC catalysts. Nevertheless, the Nd doping process was beneficial for the formation of Ce3+ and gave rise to the transformation of Lewis acid sites into Bronsted acid sites, which influenced the mechanism of SCR reaction. The generation of oxygen vacancies was in favor of the oxidation of NO to NO2 and thus facilitated the proceeding of the following reduction reactions. Thus, the presence of the Ce3+ state and oxygen vacancies played a primary role in the improvement of the low-temperature SCR performance of the CeO2-Nd/ASC catalyst.; Chemistry, Physical; SCI(E); EI; 1; ARTICLE; xidong@pku.edu.cn; 4; 2251-2259; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154105]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Yan,Wang, Jinping,Yan, Zheng,et al. Promoting effect of Nd on the reduction of NO with NH3 over CeO2 supported by activated semi-coke: an in situ DRIFTS study[J]. catalysis science technology,2015.
APA	Chen, Yan,Wang, Jinping,Yan, Zheng,Liu, Lili,Zhang, Zuotai,&Wang, Xidong.(2015).Promoting effect of Nd on the reduction of NO with NH3 over CeO2 supported by activated semi-coke: an in situ DRIFTS study.catalysis science technology.
MLA	Chen, Yan,et al."Promoting effect of Nd on the reduction of NO with NH3 over CeO2 supported by activated semi-coke: an in situ DRIFTS study".catalysis science technology (2015).