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Synergistic Effect in Ag/Fe–MnO[sub.2] Catalysts for Ethanol Oxidation

Here we report the synergistic effect of OMS-2 catalysts tested in ethanol oxidation, and the effects produced by both the addition of an Fe modifier in the catalyst preparation stage, and the introduction of Ag on its surface by the impregnation method. To analyze the action of each component, the...

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Bibliographic Details
Published in:Catalysts 2022-08, Vol.12 (8)
Main Authors: Kulchakovskaya, Ekaterina V, Dotsenko, Svyatoslav S, Liotta, Leonarda F, La Parola, Valeria, Galanov, Sergey I, Sidorova, Olga I, Vodyankina, Olga V
Format: Article
Language:English
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Summary:Here we report the synergistic effect of OMS-2 catalysts tested in ethanol oxidation, and the effects produced by both the addition of an Fe modifier in the catalyst preparation stage, and the introduction of Ag on its surface by the impregnation method. To analyze the action of each component, the Fe-modified, Ag-containing OMS-2 catalysts with different Mn/Fe ratios were prepared. Combined XPS and XRF elemental analysis confirms the states and distribution of the Ag- and Fe-containing species between the surface and bulk of the OMS-2 catalysts, which form highly dispersed Ag species on the surface of 0.05Fe-OMS-2, and are also incorporated into the OMS-2 crystalline lattice. The cooperative action of Ag and Fe modifiers improves both reoxidation ability (TPO results) and the amount of adsorbed oxygen species on the catalyst surface. The introduction of Ag to the OMS-2 and 0.05 Fe-OMS-2 surface allows a high level of activity (T[sub.80] = 150-155 °C) and selectivity (S[sub.Ac80] = 93%) towards the acetaldehyde formation.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12080872