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	Promotional effects of Nb5+ and Fe3+ co-doping on catalytic performance and SO2 resistance of MnOx-CeO2 low-temperature denitration catalyst
	Long, Lulu1,2,3; Tian, Shihong2,3; Zhao, Yongchang2,3; Zhang, Xiaoxiao2,3; Luo, Wen2,3; Yao, Xiaojiang1,2,3,4
	2023-10-15
摘要	As we know, SO2 can cause MnOx-CeO2 (MnCeOx) catalyst poisoning, which seriously shortens the service life of the catalyst. Therefore, to enhance the catalytic activity and SO2 tolerance of MnCeOx catalyst, we modified it by Nb5+ and Fe3+ co-doping. And the physical and chemical properties were characterized. These results illustrate that the Nb5+ and Fe3+ co-doping can optimally improve the denitration activity and N(2 )selectivity of MnCeOx catalyst at low temperature by improving its surface acidity, surface adsorbed oxygen as well as electronic interaction. What's more, NbOx-FeOx-MnOx-CeO2 (NbFeMnCeOx) catalyst possesses an excellent SO2 resistance due to less SO2 being adsorbed and the ammonium bisulfate (ABS) formed on its surface tends to decompose, as well as fewer sulfate species formed on its surface. Finally, the possible mechanism that Nb5+ and Fe3+ co-doping enhances the SO2 poisoning resistance of MnCeOx catalyst is proposed.
关键词	MnOx-CeO(2 )catalyst NH3-SCR reaction Low temperature SO2 resistance Nb5+ and Fe3+ co-doping
DOI	10.1016/j.jcis.2023.06.020
发表期刊	JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN	0021-9797
卷号	648页码:876-888
通讯作者	Yao, Xiaojiang(yaoxj@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:001056095200001
语种	英语