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Fluctuating Storage of the Active Phase in a Mn‐Na2WO4/SiO2 Catalyst for the Oxidative Coupling of Methane

MPS-Authors
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Werny,  Maximilian J.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Wang,  Yuanqing
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Girgsdies,  Frank
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Trunschke,  Annette
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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anie.202004778.pdf
(Publisher version), 8MB

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Citation

Werny, M. J., Wang, Y., Girgsdies, F., Schlögl, R., & Trunschke, A. (2020). Fluctuating Storage of the Active Phase in a Mn‐Na2WO4/SiO2 Catalyst for the Oxidative Coupling of Methane. Angewandte Chemie International Edition, 59(35), 14921-14926. doi:10.1002/anie.202004778.


Cite as: http://hdl.handle.net/21.11116/0000-0006-A74F-6
Abstract
Structural dynamics of a Mn‐Na2WO4/SiO2 catalyst were detected directly under reaction conditions during the oxidative coupling of methane via in situ XRD and operando Raman spectroscopy. A new concept of fluctuating storage and release of an active phase in heterogeneous catalysis is proposed that involves the transient generation of active sodium oxide species via a reversible reaction of Na2WO4 with Mn7SiO12. The process is enabled by phase transitions and melting at the high reaction temperatures that are typically applied.