The Fe-Al and Cu-Fe-Al oxide nanocomposites active in the oxidation of CO were studied by XRD, TEM, EDX, Raman spectroscopy, TPR-H₂ and differential dissolution techniques. The nanocomposites were prepared by fusion of aluminum, iron, and copper salts that leads to their inhomogeneity. The Al³⁺ cations partially dissolve in the Fe₂O₃ lattice, which leads to a significant decrease in size of iron oxide. Copper locates in the Al-rich agglomerates to form CuO nanoparticles and partially dissolves in alumina. The dissolution of copper in iron oxide and formation of a (Cu,Al,Fe)₃O₄ spinel was observed only at a high Cu loading. Hence, aluminum plays the role of a textural promoter, preventing sintering and stabilization of the high specific surface area of oxide. Copper does not act as a textural promoter, as it does not affect the crystal size of iron oxide. The addition of Cu increases the catalytic activity of iron oxide-based catalysts.

通过XRD，TEM，EDX，拉曼光谱，TPR-H ₂和差示溶解技术研究了在CO氧化中具有活性的Fe-Al和Cu-Fe-Al氧化物纳米复合材料。纳米复合材料是通过铝，铁和铜盐的熔融制备的，这导致了它们的不均匀性。Al ³⁺阳离子部分溶解在Fe ₂ O ₃晶格中，这导致氧化铁的尺寸显着减小。铜位于富含Al的团聚体中，形成CuO纳米颗粒，并部分溶解在氧化铝中。铜在氧化铁中的溶解和（Cu，Al，Fe）₃ O _4的形成仅在高Cu负载下观察到尖晶石。因此，铝起到纹理促进剂的作用，防止烧结和稳定氧化物的高比表面积。铜不充当质构促进剂，因为它不影响氧化铁的晶体尺寸。Cu的添加增加了基于氧化铁的催化剂的催化活性。