0619219 - ÚFCH JH 2026 RIV US eng J - Článek v odborném periodiku
Rzepka, Przemyslaw Andrzej - Huthwelker, T. - Dědeček, Jiří - Tabor, Edyta - Bernauer, Milan - Sklenák, Štěpán - Mlekodaj, Kinga - van Bokhoven, J. A.
Aluminum distribution and active site locations in the structures of zeolite ZSM-5 catalysts.
Science. Roč. 388, č. 6745 (2025), s. 423-428. ISSN 0036-8075. E-ISSN 1095-9203
Grant CEP: GA ČR(CZ) GM25-18196M; GA ČR(CZ) GF24-14387L; GA MŠMT(CZ) EH22_008/0004617
Institucionální podpora: RVO:61388955
Klíčová slova: zeolites * ZSM-5 catalysts * aluminium
Obor OECD: Physical chemistry
Impakt faktor: 44.8, rok: 2023 ; AIS: 21.937, rok: 2023
Způsob publikování: Open access
DOI: https://doi.org/10.1126/science.ads7290

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.
Trvalý link: https://hdl.handle.net/11104/0365957