SnO2-CeO2 OXIDATION CATALYSTS

The aim of this work was to obtain ceria-based catalysts with improved oxidation properties by adding tin dioxide (5, 10 and 20 wt %) and using the co-precipitation method of preparation.The samples were characterized by BET, ESEM, and DRIFT spectroscopy.The activity of SnO 2 -CeO 2 catalytic systems in CO oxidation was studied between room temperature to 673 K.It was found that the increase of SnO 2 content obviously increases the low temperature CO conversion.However, at 673 K all the samples reach almost the same conversion of around 98-99%.The surface acidity was studied by NH 3 adsorption in order to better understand the mechanism of CO transformation to CO 2 .