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题名: Effect of the Nature and Location of Copper Species on the Catalytic Nitric Oxide Selective Catalytic Reduction Performance of the Copper/SSZ-13 Zeolite
作者: 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
发表日期: 2014-02-01
DOI: 10.1002/cctc.201300775
卷: 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
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.
关键词[WOS]: ION-EXCHANGED ZSM-5 ;  ACTIVE-SITES ;  CU-SSZ-13 ZEOLITE ;  AMINE COMPLEX ;  NOX ;  AMMONIA ;  NH3 ;  CU-ZSM-5 ;  DENSITY ;  DECOMPOSITION
语种: 英语
WOS记录号: WOS:000337637100031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145497
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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