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用于甲烷氧化偶联的Mn-Na WO₄/SiO₂催化剂中活性相的波动存储

Fluctuating Storage of the Active Phase in a Mn-Na WO /SiO Catalyst for the Oxidative Coupling of Methane.

作者信息

Werny Maximilian J, Wang Yuanqing, Girgsdies Frank, Schlögl Robert, Trunschke Annette

机构信息

Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany.

BasCat-UniCat BASF Joint Lab, Technische Universität Berlin, Germany.

出版信息

Angew Chem Int Ed Engl. 2020 Aug 24;59(35):14921-14926. doi: 10.1002/anie.202004778. Epub 2020 Jun 17.

DOI:10.1002/anie.202004778
PMID:32364281
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7496389/
Abstract

Structural dynamics of a Mn-Na WO /SiO 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 WO with Mn SiO . The process is enabled by phase transitions and melting at the high reaction temperatures that are typically applied.

摘要

在甲烷氧化偶联反应条件下，通过原位XRD和操作拉曼光谱直接检测了Mn-Na₂WO₄/SiO₂催化剂的结构动力学。提出了多相催化中活性相波动存储和释放的新概念，该概念涉及通过Na₂WO₄与Mn₂SiO₄的可逆反应瞬生活性氧化钠物种。该过程是由通常所采用的高反应温度下的相变和熔化实现的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/23b430746709/ANIE-59-14921-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/cafad192683e/ANIE-59-14921-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/c871b36d07ea/ANIE-59-14921-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/6a9462ae4fb7/ANIE-59-14921-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/cbe48366e9bc/ANIE-59-14921-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/23b430746709/ANIE-59-14921-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/cafad192683e/ANIE-59-14921-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/c871b36d07ea/ANIE-59-14921-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/6a9462ae4fb7/ANIE-59-14921-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/cbe48366e9bc/ANIE-59-14921-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f6b1/7496389/23b430746709/ANIE-59-14921-g005.jpg

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Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10403-10407. doi: 10.1002/anie.201704758. Epub 2017 Jul 24.
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