A series of Pd/Co₃Mn_xAl_1-xO catalysts with different Mn/Al molar ratio were prepared by calcinations of corresponding Pd/Co₃Mn_xAl_1-x-HT hydrotalcites at 800 °C and investigated for catalytic oxidation of toluene. It was found that substitution of partial Al for Mn significantly enhanced catalytic activity of toluene oxidation of these catalysts. In particular, catalyst Pd/Co₃Mn_0.6Al_0.4O showed the highest catalytic activity for toluene oxidation. Light off and complete oxidation temperature was centered at about 176 °C and 210 °C, respectively. According to the TPR, TPD, and XPS results, excellent catalytic activities of Pd/Co₃Mn_xAl_1-xO are well positively associated with catalyst reducibility and oxygen species in the surface, this was due to the strong synergistic effect among the components existing in the Pd/Co₃Mn_xAl_1-xO materials.

通过在800°C下煅烧相应的Pd / Co ₃ Mn _x Al _{1- x} -HT水滑石制备了一系列Mn / Al摩尔比不同的Pd / Co ₃ Mn _x Al _{1- x} O催化剂，并研究了其催化氧化作用甲苯。发现用部分Al代替Mn可显着增强这些催化剂的甲苯氧化的催化活性。尤其是催化剂Pd / Co ₃ Mn _0.6 Al _0.4O显示出最高的甲苯氧化催化活性。起火和完全氧化温度分别位于约176°C和210°C的中心。根据TPR，TPD和XPS结果，Pd / Co ₃ Mn _x Al _{1- x} O的出色催化活性与催化剂的还原性和表面的氧种类呈正相关，这是由于Pd / Co ₃ Mn _x Al _{1- x} O之间强的协同作用所致。 Pd / Co ₃ Mn _x Al _{1- x} O材料中存在的组分。