A series of Mn/γ-Al₂O₃ and Mn_xMo_y/γ-Al₂O₃ catalysts were prepared by using Incipient Wetness Impregnation (IWI) method. The catalytic performance tests showed that the Mn₃Mo_1.25/γ-Al₂O₃ demonstrated a higher SCR performance (NO conversion of around 96%) at a broad low temperature range (150–300 °C). The characterization showed that the addition of Mo to the Mn/γ-Al₂O₃ catalysts promoted the dispersion of MnO_x on the surface of γ-Al₂O₃. The adsorption of NO could form two different species, i.e., nitrites and nitrates, on the surface of the catalyst. The presence of nitrites is beneficial to low temperature SCR. It is found that the existence of Mo in the catalyst favours the formation of Mn³⁺, which plays a critical role in the adsorption of NH₃ and therefore improves NH₃ adsorption capacity of the MnO_x/γ-Al₂O₃ catalysts. The low temperature SCR of the Mn₃Mo_1.25/γ-Al₂O₃ catalyst was found to mainly follow L-H mechanism, but E-R mechanism also plays a role to some extent. Moreover, it is found that the addition of Mo not only mitigates the deactivation of the catalysts, but also broadens the effective temperature range of the SCR catalysts.

一系列的Mn /γ-Al系的₂ ö ₃和Mn _X沫_ý /γ-Al系_2种ö ₃催化剂，通过使用初湿含浸法（IWI）方法制备。催化性能试验表明，将Mn ₃沫_1.25 /γ-Al系₂ ö ₃展示了在宽的低温范围（150-300℃）的更高的SCR性能（大约96％的NO转化率）。表征表明，添加Mo的锰/γ-Al系₂ ö ₃催化剂促进的MnO的分散_X的表面上的γ-Al ₂ ö ₃。NO的吸附可在催化剂表面形成两种不同的物质，即亚硝酸盐和硝酸盐。亚硝酸盐的存在有利于低温SCR。据发现，Mo的催化剂的存在有利于Mn的形成³⁺，其在NH的吸附中起关键作用₃，从而提高NH ₃所述的MnO吸附容量_X /γ-Al系_2种ö ₃催化剂。MN的低温SCR ₃沫_1.25 /γ-Al系₂ ö ₃发现催化剂主要遵循LH机理，但是ER机理在一定程度上也起作用。此外，发现Mo的添加不仅减轻了催化剂的失活，而且拓宽了SCR催化剂的有效温度范围。