Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6
文献类型：期刊论文
| 作者 | Su, Xiong1; Xu, Shutao1; Tian, Peng1; Li, Jinzhe1; Zheng, Anmin3; Wang, Qiang3; Yang, Miao1; Wei, Yingxu1; Deng, Feng3; Liu, Zhongmin1,2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2015-02-05 |
| 卷号 | 119期号:5页码:2589-2596 |
| 英文摘要 | By applying analysis of multiple solid-state MAS NMR spectra, the atomic coordination environment and acidity of a novel SAPO-type molecular sieve, DNL-6, are studied. 27Al MQ-MAS NMR and 31P27Al MQ-HETCOR NMR spectra reveal the existence of a SiAlSi region with Al(OSi)n (n = 14) species in the framework of DNL-6, explaining well the high concentration of single Si(OAl)4 species (3 mmol/g) accommodated in the sample. 13C MAS NMR of 2-13C-acetone adsorption indicates that there exist two kinds of strong Bronsted acid sites in DNL-6. One of them has similar strength as those in HZSM-5 and the other is even stronger, which is unusual in SAPO-type molecular sieves. Also, a discrepancy in Bronsted acid concentration between the theoretical and 1H NMR experimental results has been found, revealing the occurrence of a dehydoxylation process during the calcination. The origin of the extremely strong Bronsted acid sites in DNL-6 is investigated by density functional theory calculations, which suggest that the dehydroxylation process may lead to a local structure deformation and remarkably enhance the Bronsted acidity. More importantly, DNL-6 exhibits excellent catalytic activity in the synthesis of methylamines due to its stronger acidity. |
| 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] | SOLID-STATE NMR ; ANGLE-SPINNING NMR ; RESOLUTION HETERONUCLEAR CORRELATION ; DIFFERENT FRAMEWORK TOPOLOGIES ; HETEROGENEOUS CATALYSIS ; QUADRUPOLAR NUCLEI ; ZEOLITES ; SPECTROSCOPY ; SILICOALUMINOPHOSPHATES ; CHEMISTRY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000349136400040 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1520]  |
| 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, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Sate Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Chinese Acad Sci, State Key Lab Magnet Resonance and Atom Mol Phys, Wuhan Ctr Magnet Resonance, Inst Phys & Math, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Xiong,Xu, Shutao,Tian, Peng,et al. Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(5):2589-2596. |
| APA | Su, Xiong.,Xu, Shutao.,Tian, Peng.,Li, Jinzhe.,Zheng, Anmin.,...&Liu, Zhongmin.(2015).Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6.JOURNAL OF PHYSICAL CHEMISTRY C,119(5),2589-2596. |
| MLA | Su, Xiong,et al."Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6".JOURNAL OF PHYSICAL CHEMISTRY C 119.5(2015):2589-2596. |
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来源：武汉物理与数学研究所
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