Elucidating the structure of the W and Mn sites on the Mn-Na2WO4/SiO2 catalyst for the oxidative coupling of methane (OCM) at real reaction temperatures

Carlos A. Ortiz-Bravo,Santiago J. A. Figueroa,Raquel Portela,Carlos A. Chagas,Miguel A. Banares,Fabio Souza Toniolo

Journal of Catalysis（2022）

引用 28|浏览14

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摘要

•W sites structure changes during the Na2WO4 and WO3 phases transitions.•The oxidation state of the W sites remains mainly 6+ at heating pretreatment.•Td-W6+ sites are less distorted and more active in the presence of Oh-Mn3+ sites.

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关键词

Methane,OCM,Active sites,XANES,XAS,Raman,In situ

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