Bronsted/Lewis Acid Sites Synergy in H-MCM-22 Zeolite Studied by H-1 and Al-27 DQ-MAS NMR Spectroscopy
文献类型：期刊论文
| 作者 | Yu Zhiwu1,2; Wang Qiang1; Chen Lei1; Deng Feng1 |
| 刊名 | CHINESE JOURNAL OF CATALYSIS
 |
| 出版日期 | 2012 |
| 卷号 | 33期号:1页码:129-139 |
| 关键词 | H-MCM-22 zeolite dealumination acidity Bronsted/Lewis acid synergy double quantum-magic angle spinning nuclear magnetic resonance |
| 英文摘要 | Bronsted/Lewis acid sites synergy in H-MCM-22 zeolite was studied by solid-state nuclear magnetic resonance (NMR). Two-dimensional H-1 double quantum-magic angle spinning (DQ-MAS) NMR revealed the details of the spatial relationship between the Lewis and the Bronsted acid sites in a dealuminated H-MCM-22 zeolite, which implied the existence of a Bronsted/Lewis acid sites synergy. Two-dimensional Al-27 DQ-MAS NMR was used to give the details of the spatial proximities of various aluminum species. The Bronsted/Lewis acid sites synergy occurred in the supercage of the H-MCM-22 zeolite between a T-6 site Al and extra-framework Al species. C-13 CP/MAS NMR of adsorbed acetone demonstrated that the spatial proximities of the Bronsted and Lewis acid sites led to a synergy that enhanced the Bronsted acid strength of the dealuminated zeolites. H-1 MAS NMR of adsorbed deuterated pyridine confirmed that the Bronsted/Lewis acid sites synergy occurred in the supercage of H-MCM-22. This finding is important for understanding the mechanism of acid-catalyzed reactions on H-MCM-22 zeolites. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical |
| 研究领域[WOS] | Chemistry ; Engineering |
| 关键词[WOS] | SOLID-STATE NMR ; EXTRA-FRAMEWORK ALUMINUM ; DEALUMINATED HY ZEOLITE ; THEORETICAL CALCULATION ; MCM-22 ZEOLITE ; PROBE MOLECULE ; HIGH-FIELD ; Y-ZEOLITE ; SPIN-ECHO ; CATALYSTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300474100014 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1706]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Ctr Magnet Resonance, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Hubei, Peoples R China 2.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu Zhiwu,Wang Qiang,Chen Lei,et al. Bronsted/Lewis Acid Sites Synergy in H-MCM-22 Zeolite Studied by H-1 and Al-27 DQ-MAS NMR Spectroscopy[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(1):129-139. |
| APA | Yu Zhiwu,Wang Qiang,Chen Lei,&Deng Feng.(2012).Bronsted/Lewis Acid Sites Synergy in H-MCM-22 Zeolite Studied by H-1 and Al-27 DQ-MAS NMR Spectroscopy.CHINESE JOURNAL OF CATALYSIS,33(1),129-139. |
| MLA | Yu Zhiwu,et al."Bronsted/Lewis Acid Sites Synergy in H-MCM-22 Zeolite Studied by H-1 and Al-27 DQ-MAS NMR Spectroscopy".CHINESE JOURNAL OF CATALYSIS 33.1(2012):129-139. |
入库方式： OAI收割
来源：武汉物理与数学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。