Two series of shaped catalysts were obtained, one of them from CeO₂ and the other one from ZrO₂, to which cobalt was added. On the one hand, ceria fibers prepared by electrospinning exhibited greater catalytic activity for soot combustion, under loose contact and in the presence of NO, than those made by hydrothermal synthesis. The deposition of low loads of cobalt (2 wt.%) resulted in a positive effect for soot combustion (maximum soot combustion rate, T_M = 360 °C), whereas higher loadings (12 wt.%) did not result in a further improvement. On the other hand, cobalt catalysts supported on zirconia nanorods were prepared by hydrothermal synthesis. In comparison with the ceria catalysts, zirconia showed a better catalytic activity when the cobalt load increased from 2 to 12 wt.%, due to a better dispersion of cobalt on ZrO₂. This is in line with STEM and EDX results that indicated the presence of smaller aggregates of cobalt on the zirconia surface. Among the ZrO₂ catalysts studied, Co(12%)-ZrO₂ presented the best catalytic activity (T_M = 360 °C), obtained under loose contact conditions and in the presence of NO. The activity of the catalysts was thoroughly correlated with the characterization of the samples by XRD, SEM, EDX, STEM, LRS and XPS.

获得了两个系列的成型催化剂，其中一个来自CeO ₂，另一个来自ZrO ₂，在其中添加了钴。一方面，通过电纺丝制备的二氧化铈纤维在松散接触下和在NO存在下，比通过水热合成制备的二氧化铈纤维表现出更大的烟灰燃烧催化活性。低负荷钴（2 wt。％）的沉积对烟灰燃烧产生积极影响（最大烟灰燃烧率，T _M ＝ 360℃），而较高的负载量（12重量％）没有导致进一步的改善。另一方面，通过水热合成制备了负载在氧化锆纳米棒上的钴催化剂。与二氧化铈催化剂相比，由于钴在ZrO ₂上的分散性更好，当钴的负载量从2％增加到12 wt。％时，氧化锆显示出更好的催化活性。这与STEM和EDX结果一致，表明在氧化锆表面上存在较小的钴聚集体。在所研究的ZrO ₂催化剂中，Co（12％）-ZrO ₂表现出最佳的催化活性（T _M = 360°C），这是在松散的接触条件下和没有NO的条件下获得的。催化剂的活性与通过XRD，SEM，EDX，STEM，LRS和XPS表征的样品完全相关。