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• W3025697962 abstract "Abstract A range of Cs-doped Fe/Al 2 O 3 catalysts were prepared for the ammonia decomposition reaction. Through time on-line studies it was shown that at all loadings of Cs investigated the activity of the Fe/Al 2 O 3 catalysts was enhanced, with the optimum Cs:Fe being ca. 1. Initially, the rate of NH 3 decomposition was low, typically < 10% equilibrium conversion (99.7%@500°C) recorded after 1 h. All catalysts exhibited an induction period (typically ca. 10 h) with the conversion reaching a high of 67% equilibrium conversion for Cs:Fe = 0.5 and 1. The highest rate of decomposition observed was attributed to the balance between increasing the concentration of Cs without blocking the active site. Analysis of H 2 -TPR and XPS measurements indicated that Cs acts as an electronic promoter. Previously, Cs has been shown to act as a promoter for Ru, where Cs alters the electron density of the active site, thereby facilitating the recombination of N 2 which is considered the rate determining step. In addition, XRD and N 2 adsorption measurements suggest that with higher Cs loadings deactivation of the catalytic activity is due to a layer of CsOH that forms on the surface and blocks active sites. Graphic Abstract" @default.
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• W3025697962 date "2020-05-12" @default.
• W3025697962 modified "2023-10-15" @default.
• W3025697962 title "Ammonia Decomposition Enhancement by Cs-Promoted Fe/Al2O3 Catalysts" @default.
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• W3025697962 doi "https://doi.org/10.1007/s10562-020-03247-3" @default.
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