Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6

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	Investigation of the Strong Bronsted Acidity in a Novel SAPO-type Molecular Sieve, DNL-6
	Su, Xiong 1; Xu, Shutao 1; Tian, Peng 1; Li, Jinzhe 1; Zheng, Anmin 3; Wang, Qiang 3; Yang, Miao 1; Wei, Yingxu 1; Deng, Feng 3; Liu, Zhongmin 1,2
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	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
内容类型	期刊论文
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.