Fluctuating Storage of the Active Phase in a Mn‐Na(2)WO(4)/SiO(2) Catalyst for the Oxidative Coupling of Methane

Structural dynamics of a Mn‐Na(2)WO(4)/SiO(2) 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...

Descripción completa

Detalles Bibliográficos
Autores principales: Werny, Maximilian J., Wang, Yuanqing, Girgsdies, Frank, Schlögl, Robert, Trunschke, Annette
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7496389/
https://www.ncbi.nlm.nih.gov/pubmed/32364281
http://dx.doi.org/10.1002/anie.202004778
Descripción
Sumario:Structural dynamics of a Mn‐Na(2)WO(4)/SiO(2) 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 Na(2)WO(4) with Mn(7)SiO(12). The process is enabled by phase transitions and melting at the high reaction temperatures that are typically applied.

Ejemplares similares