Formation of the active surface of Ag/SiO2 catalysts in the presence of FeO x additives

Supported FeO _x -modified silver catalysts based on commercial silica gel and prepared via impregnation with a solution of Fe- and Ag-containing salts while varying the amount of modifier from 1 to 10 wt % are studied. It is found that the introduction of Fe-containing compounds leads to the distribution of silver in the form of clusters/ions on the surface of SiO₂, improving the reducibility of the systems in the H₂ TPR mode. After reduction at 800°C, the catalysts containing 10 wt % iron and 5 wt % silver comprise a Fe₂SiO₄ iron silicate phase.