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- W2952888921 abstract "The impact of CO on the activation and reaction characteristics of Au/ZnO catalysts in methanol synthesis from a CO2/H2 mixture was studied by kinetic, near ambient pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy at the O K-edge, together with in situ Foureir transform infrared measurements. Transient measurements under up to industrial reaction conditions (50 bar, 240 °C) show a pronounced transient increase of the activity for methanol formation from CO2/H2 after exposure to a CO/H2 reaction gas mixture, while the steady-state activity is similar to that observed directly after oxidative pretreatment. For the reaction in CO/H2, the much longer activation phase is accompanied by formation of CO2 due to reaction of CO with the ZnO catalyst support. This leads to O-vacancy formation on the support at an extent significantly higher than in CO2/H2. The consequences of these findings on the mechanistic understanding of methanol formation from CO2/H2 on Au/ZnO and for ZnO-supported catalysts in general are discussed." @default.
- W2952888921 created "2019-06-27" @default.
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- W2952888921 date "2019-06-13" @default.
- W2952888921 modified "2023-10-13" @default.
- W2952888921 title "Influence of CO on the Activation, O-Vacancy Formation, and Performance of Au/ZnO Catalysts in CO<sub>2</sub> Hydrogenation to Methanol" @default.
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- W2952888921 doi "https://doi.org/10.1021/acs.jpclett.9b00925" @default.
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