Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR

doi:10.1016/j.mcat.2017.12.014

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 环境友好催化过程团队

	Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR
	Huang, Jun 1; Huang, He 2; Liu, Licheng 2; Jiang, Hongtao 1
刊名	MOLECULAR CATALYSIS
	2018-02-01
卷号	446 页码:49-57
关键词	Manganese Oxide Chemical Valence Low-temperature Scr Xanes
ISSN号	2468-8231
DOI	10.1016/j.mcat.2017.12.014
文献子类	Article
英文摘要	MnOx based catalysts exhibit excellent low-temperature activity in the selective catalytic reduction (SCR) of NOx by NH3. The effect of Mn oxidation state (chemical valence) on the NH3-SCR activity is an interesting topic and important for designing an active catalyst. This study aimed to clarify the intrinsic effect of Mn valence in NO-SCR reaction. For this purpose, the pure MnOx (MnO, Mn3O4, Mn2O3, MnO2) and physical mixed 30% MnOx/TiO2 catalysts, as well as three Mn/TiO2 catalysts prepared by impregnation, were investigated for the low temperature NO-SCR with NH3 in the presence of excess O-2. The catalysts were characterized by N-2 adsorption, X-ray diffraction (XRD), X-ray Absorption Fine Structure (XAFS), and temperature programmed reduction of H-2 (H-2-TPR) to probe the physical and chemical properties of catalysts. The MnO5 with different chemical valence exhibited distinct intrinsic activity. The Mn-3\|O-4 and MnO/TiO2 showed the highest intrinsic activity (TOR) for the unsupported and supported catalysts, respectively. The MnOx species with low chemical valence (MnO, Mn3O4) exhibited overall high intrinsic SCR activity (larger than 0.012 NO h(-1) nm(-2)mnox). The MnOx with different valence normally changed to higher oxidation state after physically mixed with TiO2. The content of MnOx species with different valence depended on their loading and Mn precursor, showing a totally different constitution. This work provides new insights into the Mn valence effect on the intrinsic activity for low-temperature SCR. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词	SELECTIVE CATALYTIC-REDUCTION ; X-RAY-ABSORPTION ; CALCINATION TEMPERATURE ; MNOX/TIO2 CATALYSTS ; NITRIC-OXIDE ; NH3 ; MN ; AMMONIA ; PERFORMANCE ; SCATTERING
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000426411900006
资助机构	CAS Hundred Talent Program ; National Natural Science Foundation of China(21676288)
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/10623]
专题	青岛生物能源与过程研究所_环境友好催化过程团队
通讯作者	Liu, Licheng; Jiang, Hongtao
作者单位	1.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Huang, Jun,Huang, He,Liu, Licheng,et al. Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR[J]. MOLECULAR CATALYSIS,2018,446:49-57.
APA	Huang, Jun,Huang, He,Liu, Licheng,&Jiang, Hongtao.(2018).Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR.MOLECULAR CATALYSIS,446,49-57.
MLA	Huang, Jun,et al."Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR".MOLECULAR CATALYSIS 446(2018):49-57.