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题名: Enhanced In situ Continuous-Flow MAS NMR for Reaction Kinetics in the Nanocages
作者: Xu, Shutao1, 2;  Zhang, Weiping1;  Liu, Xianchun1;  Han, Xiuwen1;  Bao, Xinhe1
通讯作者: 张维萍 ;  包信和
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2009-09-30
DOI: 10.1021/ja904304h
卷: 131, 期:38, 页:13722-13727
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A new approach of in situ continuous-flow laser-hyperpolarized (129)Xe MAS NMR together with (13)C MAS NMR is designed and applied successfully to study the adsorption and reaction kinetics in the nanospace. Methanol conversion in CHA nanocages has been investigated in detail for proof of principle demonstrating the prospect of in situ NMR of reaction kinetics. Our findings well elucidates that the reaction intermediate can be identified by (13)C MAS NMR spectroscopy, meanwhile the kinetic and dynamic processes of methanol adsorption and reaction in CHA nanocages can be monitored by one- and two-dimensional hyperpolarized (129)Xe MAS NMR spectroscopy under the continuous-flow condition close to the real heterogeneous catalysis. The kinetic curves and apparent activation energy of the nanocages involving the active site are obtained quantitatively. The advantages of hyperpolarized (129)Xe with much higher sensitivity and shorter acquisition time allow the kinetics to be probed in a confined geometry under real working conditions.
关键词[WOS]: HYPERPOLARIZED XE-129 NMR ;  DIMETHYL ETHER ;  HETEROGENEOUS CATALYSIS ;  SPECTROSCOPY ;  ZEOLITES ;  METHANOL ;  CONVERSION ;  EXCHANGE ;  NANOTUBES ;  MECHANISM
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000270186600042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102317
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Xu, Shutao,Zhang, Weiping,Liu, Xianchun,et al. Enhanced In situ Continuous-Flow MAS NMR for Reaction Kinetics in the Nanocages[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2009,131(38):13722-13727.
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