In the work, supported catalysts of FeO_x and MnO_x co-supported on aluminum-modified CeO₂ was synthesized for low-temperature NH₃-selective catalytic reduction (NH₃-SCR) of NO. Impressively, the SCR activity of the obtained catalyst is markedly influenced by the adding amount of Al and the appropriate Ce/Al molar ratio is 1/2. The activity tests demonstrate that Fe–Mn/Ce1Al2 catalyst shows over 90% NO conversion at 75–250 °C and exhibits better SO₂ resistance compared to Fe–Mn/CeO₂. Fe–Mn/Ce1Al2 shows the expected physicochemical characters of the ideal catalyst including the larger surface and increased active reaction active sites by controlling the amount of Al doping. Also, the better catalytic activity is well correlated with the present advantaged surface adsorption oxygen species, Mn⁴⁺ species, Ce³⁺ species and the enhanced reducibility of Fe–Mn/Ce1Al2, which is superior to the Fe–Mn/CeO₂ catalyst. More importantly, we further demonstrate that the amount and strength of surface acid sites are improved by Al-doping and more active intermediates (monodentate nitrate) is generated during NH₃-SCR reaction. This work provides certain insight into the rational creation of simple and practical denitration catalyst environmental purification.

在这项工作中，合成了FeO _x和MnO _x共负载在铝改性CeO ₂上的负载催化剂，用于NO 的低温NH ₃ -选择性催化还原（NH ₃ -SCR）。令人印象深刻的是，所得催化剂的 SCR 活性受 Al 添加量的显着影响，合适的 Ce/Al 摩尔比为 1/2。活性测试表明，与 Fe-Mn/CeO ₂相比， Fe-Mn/Ce1Al2 催化剂在 75–250 °C 下的 NO 转化率超过 90%，并且表现出更好的 SO _2抗性。. Fe-Mn/Ce1Al2显示了理想催化剂的预期物理化学特性，包括更大的表面和通过控制Al掺杂量增加的活性反应活性位点。此外，更好的催化活性与目前优势的表面吸附氧物种、Mn ⁴⁺物种、Ce ³⁺物种以及Fe-Mn/Ce1Al2 增强的还原性（优于Fe-Mn/CeO ₂催化剂）密切相关。 . 更重要的是，我们进一步证明了铝掺杂提高了表面酸位点的数量和强度，并且在 NH _{3过程中产生了更多的活性中间体（单齿硝酸盐）。}-SCR反应。这项工作为合理创建简单实用的脱硝催化剂环境净化提供了一定的启示。