Excellent catalysts with low-temperature activity and relatively wide temperature window for selective catalytic reduction of NO with ammonia (NH₃-SCR) are highly demanded in view of the practical treatment of NO. Herein, we have designed a highly active VO_x-MnO_x/CeO₂ material based on the intrinsic requirement of SCR reaction for catalyst, namely redox sites and surface acid sites. The vanadium oxide and manganese oxide are highly dispersed over the ceria mesosphere via simple incipient wetness impregnation. The loading of manganese could introduce acid sites and enhance the redox property remarkably, while the loading of vanadium increases acid sites and weakens redox property. Through tentatively controlling the appropriate loading ratio of the two components, the optimal catalyst achieves a balance between redox property and surface acidity. The work shed light on the development of new SCR catalyst with superior low temperature activity, wide work temperature window and good hydrothermal stability.

考虑到NO的实际处理，迫切需要具有低温活性和相对宽温度窗口的用于氨选择性催化还原NO的优良催化剂(NH ₃ -SCR)。在此，我们设计了一种高活性的 VO _x -MnO _x /CeO ₂材料基于 SCR 反应对催化剂的内在要求，即氧化还原位点和表面酸性位点。氧化钒和氧化锰通过简单的初湿浸渍高度分散在氧化铈中间层。锰的负载可以引入酸位并显着提高氧化还原性能，而钒的负载增加酸位并削弱氧化还原性能。通过初步控制两组分合适的负载比，优化催化剂实现了氧化还原性能和表面酸性之间的平衡。该工作为开发具有优异低温活性、宽工作温度窗口和良好水热稳定性的新型 SCR 催化剂提供了启示。