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Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI
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...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7689718/ https://www.ncbi.nlm.nih.gov/pubmed/32542978 http://dx.doi.org/10.1002/anie.202006122 |
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author | Mayoral, Alvaro Zhang, Qing Zhou, Yi Chen, Pengyu Ma, Yanhang Monji, Taro Losch, Pit Schmidt, Wolfgang Schüth, Ferdi Hirao, Hajime Yu, Jihong Terasaki, Osamu |
author_facet | Mayoral, Alvaro Zhang, Qing Zhou, Yi Chen, Pengyu Ma, Yanhang Monji, Taro Losch, Pit Schmidt, Wolfgang Schüth, Ferdi Hirao, Hajime Yu, Jihong Terasaki, Osamu |
author_sort | Mayoral, Alvaro |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-7689718 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-76897182020-12-08 Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI Mayoral, Alvaro Zhang, Qing Zhou, Yi Chen, Pengyu Ma, Yanhang Monji, Taro Losch, Pit Schmidt, Wolfgang Schüth, Ferdi Hirao, Hajime Yu, Jihong Terasaki, Osamu Angew Chem Int Ed Engl Research Articles 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. John Wiley and Sons Inc. 2020-07-20 2020-10-26 /pmc/articles/PMC7689718/ /pubmed/32542978 http://dx.doi.org/10.1002/anie.202006122 Text en © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Mayoral, Alvaro Zhang, Qing Zhou, Yi Chen, Pengyu Ma, Yanhang Monji, Taro Losch, Pit Schmidt, Wolfgang Schüth, Ferdi Hirao, Hajime Yu, Jihong Terasaki, Osamu Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title | Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title_full | Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title_fullStr | Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title_full_unstemmed | Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title_short | Direct Atomic‐Level Imaging of Zeolites: Oxygen, Sodium in Na‐LTA and Iron in Fe‐MFI |
title_sort | direct atomic‐level imaging of zeolites: oxygen, sodium in na‐lta and iron in fe‐mfi |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7689718/ https://www.ncbi.nlm.nih.gov/pubmed/32542978 http://dx.doi.org/10.1002/anie.202006122 |
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