Oxidative Fluorination of Cu/ZnO Methanol Catalysts

Dybbert, Valentin; Fehr, Samuel Matthias; Klein, Florian; Schaadt, Achim; Hoffmann, Anke; Frei, Elias; Erdem, Emre; Ludwig, Thilo; Hillebrecht, Harald; Krossing, Ingo

doi:10.1002/anie.201811267

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Oxidative Fluorination of Cu/ZnO Methanol Catalysts

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Frei, Elias
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Krossing-2019-Angewandte_Chemie_International_Edition.pdf
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引用

Dybbert, V., Fehr, S. M., Klein, F., Schaadt, A., Hoffmann, A., Frei, E., Erdem, E., Ludwig, T., Hillebrecht, H., & Krossing, I. (2019). Oxidative Fluorination of Cu/ZnO Methanol Catalysts. Angewandte Chemie International Edition, 58(37), 12935-12939. doi:10.1002/anie.201811267.

引用: https://hdl.handle.net/21.11116/0000-0003-CF29-7

要旨

The influence of a mild difluorine treatmenton Cu/ZnO precatalysts for methanol synthesis was investigated. It led to the incorporation of 1.2...1.3±0.1 wt.% fluoride into the material. Fluorination considerably increased the amount of ZnO_x related defect sites on the catalysts and significantly increased the space-time yields. Although the apparent activation energy E_{A, app} for methanol formation from CO₂ and H₂ was almost unchanged, the E_{A, app} for the rWGS reaction increased considerably. Overall, fluorination led to a significant gain in methanol selectivity and productivity. Apparently, also the quantity of active sites increased.