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

doi:10.1016/j.mcat.2017.12.014

QIBEBT-IR > 环境友好催化过程研究组

	Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR
	Huang, Jun 1; Huang, He 2; Liu, Licheng2 ; Jiang, Hongtao 1
	2018-02-01
发表期刊	MOLECULAR CATALYSIS
ISSN	2468-8231
卷号	446 页码:49-57
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.
文章类型	Article
关键词	Manganese Oxide Chemical Valence Low-temperature Scr Xanes
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.mcat.2017.12.014
关键词[WOS]	SELECTIVE CATALYTIC-REDUCTION ; X-RAY-ABSORPTION ; CALCINATION TEMPERATURE ; MNOX/TIO2 CATALYSTS ; NITRIC-OXIDE ; NH3 ; MN ; AMMONIA ; PERFORMANCE ; SCATTERING
收录类别	SCI
语种	英语
WOS研究方向	Chemistry
项目资助者	CAS Hundred Talent Program ; National Natural Science Foundation of China(21676288)
WOS类目	Chemistry, Physical
WOS记录号	WOS:000426411900006
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/10624
专题	环境友好催化过程研究组
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.