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	Effect of Ti4+ and Sn4+ co-incorporation on the catalytic performance of CeO2 -MnOx catalyst for low temperature NH3-SCR
	Chen, Li1,2; Yao, Xiaojiang1; Cao, Jun1; Yang, Fumo2,3; Tang, Changjin4; Dong, Lin4
	2019-05-15
摘要	A novel Ti4+ and Sn4- co-incorporated CeO2-MnOx based catalyst was synthesized by an inverse co-precipitation method with the purpose of inhibiting the formation of N2O and enhancing the NOx conversion of CeO2-MnOx catalyst for NH3-SCR at low temperature. The obtained catalysts were characterized by a series of XRD, Raman, N-2-physisorption, NH3-TPD, H-2-TPR, XPS, and in situ DRIFTS techniques in details. The experiment results suggested that CeO2-MnOx-TiO2-SnO2 (Ce-Mn-Ti-Sn) catalyst displayed the optimal catalytic performance with an enhancement of 30% compared with CeO2-MnOx(Ce-Mn) in the range of 225-275 degrees C. Moreover, the N2O formation was inhibited remarkably compared to Ce-Mn (152 ppm), and there was no N2O (0 ppm) detected even at 250 degrees C. This is linked to moderate weakening of redox property, more generation of acid sites, enhancement of acidic strength, as well as large amount of Ce3+, oxygen vacancies, and absorbed oxygen species, which are contributed to improving the chemical property of Ce-Mn-Ti-Sn catalyst, and further enhancing the catalytic performance and inhibiting the generation of N2O.
关键词	CeO2-MnOx-TiO2-SnO2 catalyst Ti4+ and Sn4+ co-incorporation Low-temperature NH3-SCR Catalytic performance By-product N2O
DOI	10.1016/j.apsusc.2019.01.095
发表期刊	APPLIED SURFACE SCIENCE
ISSN	0169-4332
卷号	476页码:283-292
收录类别	SCI
WOS记录号	WOS:000459458600032
语种	英语