Probing the spatial proximities among acid sites in dealuminated H-Y zeolite by solid-state NMR spectroscopy
文献类型：期刊论文
| 作者 | Li, Shenhui2; Huang, Shing-Jong1; Shen, Wanling2; Zhang, Hailu2; Fang, Hanjun2; Zheng, Anmin2; Liu, Shang-Bin1; Deng, Feng2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2008-09-18 |
| 卷号 | 112期号:37页码:14486-14494 |
| 英文摘要 | A comprehensive study has been made to probe the spatial proximities among different acid sites in dealuminated H-Y zeolites modified with various degrees of calcination, steam, and acid treatments by using a variety of different solid-state NMR techniques, including multinuclear MAS NMR and two-dimensional (1)H double-quantum (DQ) MAS NMR spectroscopy. The effects of dealumination treatments on the nature, concentration, and location of extraframework At species in H-Y zeolites were followed by (1)H DQ MAS NMR of hydroxyl protons in conjunction with (1)H, (27)Al, and (29)Si MAS NMR results. It was found that the extraframework AlOH species (Lewis acid sites) are always in close proximity to the bridging AlOHSi hydroxyls (Bronsted acid sites) on the framework of dealuminated H-Y zeolites prepared by thermal and hydrothermal treatments, indicating the presence of a Bronsted/Lewis acid synergy effect. However, such an effect is absent in acid-treated H-Y zeolites, as also confirmed by (13)C CP/MAS NMR of adsorbed 2-(13)C-acetone. |
| 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] | NUCLEAR-MAGNETIC-RESONANCE ; ANGLE-SPINNING NMR ; EXTRA-FRAMEWORK ALUMINUM ; CHEMISORBED TRIETHYLPHOSPHINE OXIDE ; P-31 MAS-NMR ; BRONSTED-ACID ; TRIMETHYLPHOSPHINE OXIDE ; AMMONIUM HEXAFLUOROSILICATE ; CATALYTIC-PROPERTIES ; AL-27 MAS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000259140700040 |
| 公开日期 | 2015-10-13 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8103]  |
| 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.Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan 2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ctr Magnet Resonance, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shenhui,Huang, Shing-Jong,Shen, Wanling,et al. Probing the spatial proximities among acid sites in dealuminated H-Y zeolite by solid-state NMR spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(37):14486-14494. |
| APA | Li, Shenhui.,Huang, Shing-Jong.,Shen, Wanling.,Zhang, Hailu.,Fang, Hanjun.,...&Deng, Feng.(2008).Probing the spatial proximities among acid sites in dealuminated H-Y zeolite by solid-state NMR spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C,112(37),14486-14494. |
| MLA | Li, Shenhui,et al."Probing the spatial proximities among acid sites in dealuminated H-Y zeolite by solid-state NMR spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C 112.37(2008):14486-14494. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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