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Effect of the Nature and Location of Copper Species on the Catalytic Nitric Oxide Selective Catalytic Reduction Performance of the Copper/SSZ-13 Zeolite
Guo, Qiang1,2; Fan, Fengtao1; Ligthart, D. A. J. Michel2; Li, Guanna1,2; Feng, Zhaochi1; Hensen, Emiel J. M.2; Li, Can1
关键词Copper Raman Spectroscopy Scr Reaction Ssz-13 Zeolites
刊名CHEMCATCHEM
2014-02-01
DOI10.1002/cctc.201300775
6期:2页:634-639
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]ION-EXCHANGED ZSM-5 ; ACTIVE-SITES ; CU-SSZ-13 ZEOLITE ; AMINE COMPLEX ; NOX ; AMMONIA ; NH3 ; CU-ZSM-5 ; DENSITY ; DECOMPOSITION
英文摘要The nature and location of copper in Cu/SSZ-13 zeolites synthesized by using a one-pot hydrothermal approach with Cu-tetraethylenepentamine as a template and by the ion exchange of SSZ-13 were investigated by applying H-2-temperature- programmed reduction, FTIR, EPR, and in situ Raman spectroscopic techniques. The one-pot synthesized Cu/SSZ-13 zeolite contains predominantly isolated copper ions in the large cages, whereas copper species in the ion-exchanged Cu/SSZ-13 zeolite occupy sites in the large cages of the chabazite (CHA) structure and the six-membered rings of the CHA structure. If the one-pot synthesized Cu/SSZ-13 zeolite is exchanged with the NH4NO3 solution in addition to the removal of a part of copper ions, the remaining copper ions in the CHA structure relocated from the large cages to the six-membered rings. Isolated copper dominated in all Cu/SSZ-13 zeolites. The in situ Raman spectra demonstrated that Cu-O-Cu dimers form at higher copper content. The bis-mu-oxo dicopper(III) complex is observed only in the ion-exchanged sample upon dehydration. The higher NO selective catalytic reduction activity of the one-pot synthesized sample in a wide temperature range appears to be due to the predominance of isolated Cu2+ sites in the large cages, and their higher reactivity is possibly owing to the lower stability of Cu2+ at these sites.
语种英语
WOS记录号WOS:000337637100031
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145497
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Eindhoven Univ Technol, Schuit Inst Catalysis, Lab Inorgan Mat Chem, NL-5600 MB Eindhoven, Netherlands
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Guo, Qiang,Fan, Fengtao,Ligthart, D. A. J. Michel,et al. Effect of the Nature and Location of Copper Species on the Catalytic Nitric Oxide Selective Catalytic Reduction Performance of the Copper/SSZ-13 Zeolite[J]. CHEMCATCHEM,2014,6(2):634-639.
APA Guo, Qiang.,Fan, Fengtao.,Ligthart, D. A. J. Michel.,Li, Guanna.,Feng, Zhaochi.,...&Li, Can.(2014).Effect of the Nature and Location of Copper Species on the Catalytic Nitric Oxide Selective Catalytic Reduction Performance of the Copper/SSZ-13 Zeolite.CHEMCATCHEM,6(2),634-639.
MLA Guo, Qiang,et al."Effect of the Nature and Location of Copper Species on the Catalytic Nitric Oxide Selective Catalytic Reduction Performance of the Copper/SSZ-13 Zeolite".CHEMCATCHEM 6.2(2014):634-639.
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