(Co3O4, CoO, thenCoAl2O4). The CO adsorption takes place on both cationic and metallic sites in all studied samples. However, the removal of CO on metallic sites is much easier in the catalyst with lower metal-support interactions. Reactions between the adsorbed CO and lattice oxygen have been observed in all samples at room temperature.
Catalytic activity for the CO combustion reaction
(CO + 1/2O2) increases with a decrease in metal-support
interactions of the catalysts. With variations in the support
chemical reactivity, as shown in this work, the structure and
chemical nature of Co/Al2O3 catalysts can be investigated in a
greater depth