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Aluminum distribution and active site locations in the structures of zeolite ZSM-5 catalysts
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SYSNO ASEP 0619219 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Aluminum distribution and active site locations in the structures of zeolite ZSM-5 catalysts Author(s) Rzepka, Przemyslaw Andrzej (UFCH-W)
Huthwelker, T. (CH)
Dědeček, Jiří (UFCH-W) RID, ORCID
Tabor, Edyta (UFCH-W) RID, ORCID
Bernauer, Milan (UFCH-W) ORCID, RID
Sklenák, Štěpán (UFCH-W) RID, ORCID, SAI
Mlekodaj, Kinga (UFCH-W) RID, ORCID
van Bokhoven, J. A. (CH)Source Title Science. - : American Association for the Advancement of Science - ISSN 0036-8075
Roč. 388, č. 6745 (2025), s. 423-428Number of pages 6 s. Language eng - English Country US - United States Keywords zeolites ; ZSM-5 catalysts ; aluminium Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GM25-18196M GA ČR - Czech Science Foundation (CSF) GF24-14387L GA ČR - Czech Science Foundation (CSF) EH22_008/0004617 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 DOI https://doi.org/10.1126/science.ads7290 Annotation Zeolites have exceptional catalytic performance in oil refining and chemical synthesis that can be attributed to their well-defined porous structures that host active sites. This study pinpoints the exact locations of aluminum atoms in ZSM-5 structures—a key zeolite catalyst. Aluminum siting governs catalytic efficiency in acid and redox processes. Anomalous x-ray powder diffraction (AXRPD) at the aluminum K-edge probes the long-range order of aluminum atoms within the ZSM-5 frameworks, precisely quantifying both isolated aluminum atoms and Al(-O-Si-O-)xAl sequences (aluminum pairs). Supported by nuclear magnetic resonance studies, AXRPD unambiguously determines the crystallographic organization of aluminum pairs, recognized spectroscopically as α, β, and γ sites, linking their distribution to superior catalytic activity in propene oligomerization. This combined approach provides essential insights for optimizing zeolite catalysts and enhancing their performance. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2026 Electronic address https://hdl.handle.net/11104/0365957
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