Bronsted/Lewis Acid Synergy in H-ZSM-5 and H-MOR Zeolites Studied by H-1 and Al-27 DQ-MAS Solid-State NMR Spectroscopy
文献类型：期刊论文
| 作者 | Yu, Zhiwu1,2; Li, Shenhui1; Wang, Qiang1; Zheng, Anmin1; Jun, Xu1; Chen, Lei1; Deng, Feng1 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2011-11-17 |
| 卷号 | 115期号:45页码:22320-22327 |
| 英文摘要 | The spatial proximities of acid sites in dealuminated H-MOR and H-ZSM-5 zeolites have been comprehensively studied by two-dimensional H-1 and Al-27 double-quantum magic-angle spinning (DQ-MAS) NMR spectroscopy. H-1 DQ-MAS NMR revealed the detailed spatial proxirnities among Bronsted and Lewis acid sites, while Al-27 DQ-MAS NMR probed the detailed spatial proximities among various aluminum species in the dealuminated zeolites. It was found that all of the extra-framework aluminum species (EFAL, Lewis acid sites) are always in close proximity to the framework aluminum (Bronsted acid sites) in both H-MOR and H-ZSM-5 zeolites. The result from C-13 CP/MAS NMR of adsorbed acetone demonstrated that the spatial proximities between Bronsted and Lewis acid sites lead to a synergy effect that can remarkably enhance the Bronsted acid strength of the dealuminated zeolites. On the basis of these experimental results, we proposed a model to describe the Bronsted/Lewis acid synergy in the dealuminated zeolites. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 关键词[WOS] | EXTRA-FRAMEWORK ALUMINUM ; NUCLEAR-MAGNETIC-RESONANCE ; C-13 CHEMICAL-SHIFT ; DOUBLE-QUANTUM NMR ; Y-ZEOLITE ; THEORETICAL CALCULATION ; QUADRUPOLAR NUCLEI ; SHAPE SELECTIVITY ; HZSM-5 ZEOLITES ; HIGH-FIELD |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296685800028 |
| 公开日期 | 2015-12-01 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8228]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Zhiwu,Li, Shenhui,Wang, Qiang,et al. Bronsted/Lewis Acid Synergy in H-ZSM-5 and H-MOR Zeolites Studied by H-1 and Al-27 DQ-MAS Solid-State NMR Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(45):22320-22327. |
| APA | Yu, Zhiwu.,Li, Shenhui.,Wang, Qiang.,Zheng, Anmin.,Jun, Xu.,...&Deng, Feng.(2011).Bronsted/Lewis Acid Synergy in H-ZSM-5 and H-MOR Zeolites Studied by H-1 and Al-27 DQ-MAS Solid-State NMR Spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C,115(45),22320-22327. |
| MLA | Yu, Zhiwu,et al."Bronsted/Lewis Acid Synergy in H-ZSM-5 and H-MOR Zeolites Studied by H-1 and Al-27 DQ-MAS Solid-State NMR Spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C 115.45(2011):22320-22327. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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