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  Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI

Mayoral, A., Zhang, Q., Zhou, Y., Chen, P., Ma, Y., Monji, T., et al. (2020). Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI. Angewandte Chemie International Edition, 59(44), 19510-19517. doi:10.1002/anie.202006122.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-43B5-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-43B6-0
Genre: Journal Article

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 Creators:
Mayoral, Alvaro1, 2, Author
Zhang, Qing1, Author
Zhou, Yi3, Author
Chen, Pengyu4, Author
Ma, Yanhang1, Author
Monji, Taro5, Author
Losch, Pit6, Author              
Schmidt, Wolfgang6, Author              
Schüth, Ferdi7, Author              
Hirao, Hajime8, Author
Yu, Jihong9, Author
Terasaki, Osamu1, 10, Author
Affiliations:
1Centre for High-resolution Electron Microscopy (C ħEM) , School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai, 201210 China, ou_persistent22              
2Institute of Materials Science of Aragon (ICMA), Spanish National Research Council (CSIC), Advanced Microscopy Laboratory (LMA), University of Zaragoza, 12, Calle de Pedro Cerbuna, 50009 Zaragoza, Spain, ou_persistent22              
3Key Laboratory of Biomedical Polymers-Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072 China, ou_persistent22              
4Zhiyuan College & School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 China, ou_persistent22              
5Hitachi Solutions East (Japan) Ltd., Sendai, Japan, ou_persistent22              
6Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445618              
7Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
8Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China, ou_persistent22              
9State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, Jilin University, Changchun, 130012 China, ou_persistent22              
10Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden, ou_persistent22              

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Free keywords: annular bright-field analysis; beam damage; electron diffraction; electron microscopy; zeolites
 Abstract: Zeolites are becoming more versatile in their chemical functions through rational design of their frameworks. Therefore, direct imaging of all atoms at the atomic scale, basic units (Si, Al, and O), heteroatoms in the framework, and extra‐framework cations, is needed. TEM provides local information at the atomic level, but the serious problem of electron‐beam damage needs to be overcome. Herein, all framework atoms, including oxygen and most of the extra‐framework Na cations, are successfully observed in one of the most electron‐beam‐sensitive and lowest framework density zeolites, Na‐LTA . Zeolite performance, for instance in catalysis, is highly dependent on the location of incorporated heteroatoms. Fe single atomic sites in the MFI framework have been imaged for the first time. The approach presented here, combining image analysis, electron diffraction, and DFT calculations, can provide essential structural keys for tuning catalytically active sites at the atomic level.

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Language(s): eng - English
 Dates: 2020-04-282020-06-162020-10-26
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.202006122
 Degree: -

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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem., Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 59 (44) Sequence Number: - Start / End Page: 19510 - 19517 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851