156567 20251017144601.0 doi 10.1002/anie.202006122 sideral 118894 ART-2020-118894 eng Mayoral, A. Universidad de Zaragoza (orcid)0000-0002-5229-2717 Direct Atomic-Level Imaging of Zeolites: Oxygen, Sodium in Na-LTA and Iron in Fe-MFI 2020 Access copy available to the general public Unrestricted 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 theMFIframework 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. info:eu-repo/grantAgreement/ES/MICINN/RYC-2018-024561-I info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 15.336 2020 CHEMISTRY, MULTIDISCIPLINARY 16 / 178 = 0.09 2020 Q1 T1 5.831 2020 Chemistry (miscellaneous) 2020 Q1 Catalysis 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Zhang, Q. Zhou, Y. Chen, P.Y. Ma, Y.H. Monji, T. Losch, P. Schmidt, W. Schuth, F. Hirao, H. Yu, J.H. Terasaki, O. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 59, 44 (2020), 19510-19517 Angew. Chem. (Int. ed.) Angewandte Chemie (International ed.) 1433-7851 3275518 http://zaguan.unizar.es/record/156567/files/texto_completo.pdf Versión publicada 3006639 http://zaguan.unizar.es/record/156567/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:156567 articulos driver 2025-10-17-14:14:11 ARTICLE