An efficient MnO_x/CeO₂/ZSM-5 catalyst was developed for selective oxidation of diethylamine (DEA) with high N₂ selectivity in a wide temperature window (ΔT = 140 °C), owing to the existence of oxidation and selective catalytic reduction (SCR) active sites. MnO_x species prefer to locate on the surface of CeO₂ compared to ZSM-5, and the presence of CeO₂ is beneficial to form more Mn⁴⁺ species, the active sites for oxidation reaction. The mechanistic investigation suggests that internal SCR of NO_x generated from the over-oxidized DEA is the crucial pathway for N₂ generation. The high SCR activity of the MnO_x/CeO₂/ZSM-5 catalyst in oxidation conditions is mainly attributed to the synergistic catalysis of Mn⁴⁺ species and acid sites of ZSM-5, the active sites for SCR reaction. Thus, it has been clearly clarified that addition of CeO₂ and its addition sequence could modulate the surface active sites of MnO_x/ZSM-5 catalyst for the selective catalytic oxidation of DEA.

由于存在氧化和选择性催化作用，开发了一种高效的 MnO _x /CeO ₂ /ZSM-5 催化剂，用于在宽温度窗口（ΔT = 140 °C）内具有高 N 2 选择性的_二乙胺（DEA）选择性氧化还原（SCR）活性位点。与ZSM-5相比，MnO _x物种更倾向于位于CeO _{2的表面，并且CeO 2}的存在有利于形成更多的Mn ⁴⁺物种，即氧化反应的活性位点。机理研究表明，由过氧化的 DEA 产生的 NO _{x的内部 SCR 是 N 2的关键途径。}一代。MnO _x /CeO ₂ /ZSM-5 催化剂在氧化条件下的高 SCR 活性主要归功于 Mn ⁴⁺物种和 SCR 反应活性位点 ZSM-5 的酸性位点的协同催化作用。因此，已经清楚地阐明了CeO ₂的添加及其添加顺序可以调节MnO _x /ZSM-5 催化剂的表面活性位点，用于DEA的选择性催化氧化。