Five Cu(x)CeMgAlO mixed oxides with different copper contents (x) ranging from 6 to 18 at. % with respect to cations, but with fixed 10 at. % Ce and Mg/Al atomic ratio of 3, were prepared by thermal decomposition of LDH precursors at 750 °C. Cu(15)CeMgAlO was also calcined at 550 and 650 °C. They were characterized by XRD, SEM-EDX, nitrogen adsorption/desorption, H2-TPR, XPS and DR-UV-Vis techniques. Their catalytic properties in the total oxidation of methane were evaluated and compared with those of an industrial Pd/Al2O3 catalyst. Cu(15)CeMgAlO was the most active catalyst in this series, with a T50 value of only ca. 45 °C higher than that of Pd/Al2O3. This difference becomes as low as ca. 25 °C for the Cu(15)CeMgAlO system calcined at 550 °C. The excellent stability on stream of the Cu(15)CeMgAlO catalyst was evidenced.
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