A supported gold catalyst was prepared by the deposition-precipitation method from an aqueous solution of HAuCl4 ⋅ 3H2O on synthesized Fe3O4. Calcination at different temperatures caused transformations of Fe3O4 to γ-Fe2O3 and α-Fe2O3. CO oxidations over Au/Fe3O4 and Au/γ-Fe2O3 were superior compared to Au/α-Fe2O3
