The Mn-Ce mixed oxides are frequently used for catalytic oxidation of NO. However, to achieve better performance, a large amount of Ce element is usually engaged in the preparation, in spite of its low abundance and high cost. Herein, a facile sovothermal method was presented to prepare hollow MnOx-CeO₂ composites. The structural and physiochemical properties of the products were carefully investigated and their catalytic performance was evaluated. The most active sample possesses a bulk Mn/(Mn + Ce) ratio of 74.5 %, which shows a maximum NO conversion of 90.6 % at 270 °C (GHSV = 120,000 h⁻¹). It is believed that the superior catalytic activity is largely due to the enrichment of Ce element and the high content of Mn⁴⁺ species on the surface, while the porous structure is also beneficial.

Mn-Ce混合氧化物常用于NO的催化氧化。然而，为了获得更好的性能，尽管其Cb元素含量低且成本高，但是通常会在制备中使用大量的Ce元素。在此，提出了一种简便的声热方法来制备中空MnOx-CeO ₂复合材料。仔细研究了产物的结构和物理化学性质，并评估了它们的催化性能。活性最高的样品的总Mn /（Mn + Ce）比为74.5％，在270°C（GHSV = 120,000 h ^-1）时显示最大NO转化率为90.6％。可以认为，优异的催化活性主要归因于Ce元素的富集和Mn ⁴⁺的高含量 物质在表面上，而多孔结构也是有益的。