Co, Ce and Co-Ce nanofibers were synthesized by the electrospinning method. To obtain mixed fibers, Co was incorporated in two ways: one step synthesis and sequential synthesis. Nanofibers were applied to two reactions: gas-solid (CO oxidation) and solid-solid-gas (combustion of diesel soot). Different activity trends were observed in both reactions. For soot combustion, Co-Ce nanofibers were more active either than Co or Ce nanofibers. For CO oxidation instead, the activity order was Co > Co-Ce > Ce. Moreover, in the case of soot combustion, for all samples the temperature of maximum combustion rate occurred at a relatively narrow range (350−390 °C). On the contrary, for CO oxidation the temperature range for T₅₀ was notably wider (150−325 °C). The high activity shown for all the samples for soot oxidation is related to the multiple contact points between the fibers and the soot particles, and the trend observed for CO oxidation related to the higher redox capacity of Co, as observed from CO-TPR experiments.

Co、Ce和Co-Ce纳米纤维通过静电纺丝法合成。为了获得混合纤维，Co 以两种方式掺入：一步合成和顺序合成。纳米纤维应用于两种反应：气固（CO 氧化）和固固气（柴油机烟灰燃烧）。在两种反应中观察到不同的活性趋势。对于烟尘燃烧，Co-Ce 纳米纤维比 Co 或 Ce 纳米纤维更活跃。对于 CO 氧化，活性顺序为 Co > Co-Ce > Ce。此外，在煤烟燃烧的情况下，对于所有样品，最大燃烧速率的温度发生在相对较窄的范围内（350-390°C）。相反，对于 CO 氧化，T ₅₀的温度范围明显更宽 (150−325 °C)。如从 CO-TPR 实验观察到的，所有样品的烟灰氧化显示出的高活性与纤维和烟灰颗粒之间的多个接触点有关，而观察到的 CO 氧化趋势与 Co 的更高氧化还原能力有关。