Design and synthesis of highly active MoVTeNb-oxides for ethane oxidative dehydrogenation



Melzer, Daniel, Mestl, Gerhard, Wanninger, Klaus, Zhu, Yuanyuan, Browning, Nigel D ORCID: 0000-0003-0491-251X, Sanchez-Sanchez, Maricruz and Lercher, Johannes A
(2019) Design and synthesis of highly active MoVTeNb-oxides for ethane oxidative dehydrogenation. NATURE COMMUNICATIONS, 10.

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Abstract

Ethane oxidative dehydrogenation (ODH) is an alternative route for ethene production. Crystalline M1 phase of Mo-V mixed metal oxide is an excellent catalyst for this reaction. Here we show a hydrothermal synthesis method that generates M1 phases with high surface areas starting from poorly soluble metal oxides. Use of organic additives allows control of the concentration of metals in aqueous suspension. Reactions leading to crystalline M1 take place at 190 °C, i.e., approximately 400 °C lower than under current synthesis conditions. The evolution of solvated polyoxometalate ions and crystalline phases in the solid is monitored by spectroscopies. Catalysts prepared by this route show higher ODH activity compared to conventionally prepared catalysts. The higher activity is due not only to the high specific surface area but also to the corrugated lateral termination of the M1 crystals, as seen by atomic resolution electron microscopy, exposing a high concentration of catalytically active sites.

Item Type: Article
Uncontrolled Keywords: Catalyst synthesis, Chemical engineering, Heterogenous catalysis
Depositing User: Symplectic Admin
Date Deposited: 30 Sep 2019 09:19
Last Modified: 09 Sep 2022 04:10
DOI: 10.1038/s41467-019-11940-0
Open Access URL: https://doi.org/10.1038/s41467-019-11940-0
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3056416