Počet záznamů: 1
Oxygen Splitting and Methane Oxidation over Fe-Mordenite: Insight by the Operando 2D COS UV-Vis-NIR-IR Approach
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SYSNO ASEP 0583973 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Oxygen Splitting and Methane Oxidation over Fe-Mordenite: Insight by the Operando 2D COS UV-Vis-NIR-IR Approach Tvůrce(i) Tarach, K. (PL)
Sobalska, J. (PL)
Held, A. (PL)
Dědeček, Jiří (UFCH-W) RID, ORCID
Tabor, Edyta (UFCH-W) RID, ORCID
Góra-Marek, K. (PL)Zdroj.dok. Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 128, č. 9 (2024), s. 3759-3769Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova hydrogen-atom transfer ; active-site ; electronic-structure ; bond activation ; zeolites ; identification ; catalysts ; dioxygen ; acid ; hydroxylation Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA22-06737S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 001173716500001 EID SCOPUS 85186069862 DOI 10.1021/acs.jpcc.3c08225 Anotace Activation of molecular oxygen and subsequent oxidation of methane over Fe sites in mordenite zeolites with different content of framework Al atoms were studied in the continuous regime at low temperatures. For this purpose, reactivity tests of methane oxidation by molecular oxygen over iron mordenite zeolites were combined with an operando 2D COS UV-vis-NIR-IR study to analyze the reaction pathway. The transmission spectra in the visible-NIR-IR range of investigated iron mordenites revealed the structural changes of Fe(II) after O2 treatment and the formation of the spectral features typical for alpha-O stabilized on iron. Mass spectrometry analysis of gaseous products of the simultaneous interaction of methane and oxygen with iron mordenite revealed the formation of methanol, water, carbon monoxide, and carbon dioxide. Moreover, operando 2D COS UV-vis-NIR-IR also evidenced the presence of formaldehyde, formate, carbon dioxide, and carbon monoxide as products of subsequent methanol oxidation. The differences in the reaction pathway of methane oxidation over Fe-mordenite compared to Fe-ferrierite and Fe-*BEA catalysts reflect unique properties of mordenite topology providing isolated alpha-oxygens in individual mordenite pockets, although formed by splitting of molecular oxygen by two cooperating iron ions and the nature of adsorption sites in the mordenite matrix. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2025 Elektronická adresa https://hdl.handle.net/11104/0351965
Počet záznamů: 1