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- W4320717802 abstract "To exploit the potential of both ZrO2 and CeO2, the mixed oxides with Ce content up to 5 wt.% were prepared via the simple coprecipitation method, subsequently loaded with Au catalysts, and investigated in the hydrogenation of CO2. The obtained catalysts, namely Au/ZrCex (x = nCe/nZr = 0.0–0.1), exhibit similar Au content (0.7 wt.%), structural and textural properties, however, considerably different acidic/basic properties and great surface oxygen vacancy. The introduction of Ce leads to slightly decreased CO2 conversion, which was found proportional to the Ce content. Interestingly, it is evidenced that the methanol selectivity is closely related to the acidic/basic properties of the catalysts employed. Over the broad range of acid site density (ASD) ranging from 400 to 700 μmol g−1, the highest methanol selectivity of 27 % was recorded at 250 °C and 40 bar over the catalyst exhibiting an ASD of 600 μmol g−1, which decreased with further increasing ASD. The volcano-shape trend was also discovered for the base site density showing the critical point at 120 μmol g−1 over the range from 90 to 210 μmol g−1. These findings suggest that the acidic/basic properties can be tuned, e.g., via thermal treatment, to tailor the product distribution of the CO2 hydrogenation. Above all, the Au catalysts supported on ZrO2–CeO2 mixed oxides exhibit excellent catalytic stability, e.g., a methanol formation rate of 3.32 gCH3OH∙gAu∙h-1 is remained over the reaction course of 93 h at 250 °C and 40 bar for Au/ZrCe0.025 sample." @default.
- W4320717802 created "2023-02-15" @default.
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- W4320717802 date "2023-05-01" @default.
- W4320717802 modified "2023-10-16" @default.
- W4320717802 title "Correlations between the catalyst properties and catalytic activity of Au on ZrO2-CeO2 in the hydrogenation of CO2" @default.
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- W4320717802 doi "https://doi.org/10.1016/j.apsusc.2023.156737" @default.
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