A set of Pd-M-Al (M = Ce, La, Y, Ni, and Mg) composite oxides with an ordered mesoporous structure were obtained, and the influence of the promoters on the catalytic properties of 1%Pd/Al2O3 was investigated for the catalytic combustion of methane. The samples were characterized using multiple techniques. The results indicated that the addition of promoters has little impact on the morphology of the ordered mesoporous Al2O3 framework and Al3+ coordination environments. Among the catalysts, the ordered mesoporous 1%Pd-La/Al2O3 catalyst showed an excellent activity with a T 90 of 420 °C at 18 L/(g·h) and catalytic stability without notable deactivation for 2000 min, compared with the 1%Pd/Al2O3. The outstanding catalytic performance is mainly related to the stabilization of PdO by La2O3 in the confined mesoporous skeleton of the catalyst.

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