以硝酸铈和硝酸锰为原料，采用共沉淀法制备了系列铈锰催化剂，考察了陈化时间对催化剂性能的影响，并将其用于柴油车尾气中的碳烟颗粒物催化燃烧。结果表明，陈化时间对铈锰催化剂催化碳烟燃烧性能的影响显著。相对未进行陈化的催化剂，陈化7 h后催化剂活性曲线上的峰值温度降低了59℃，主要原因是陈化时间为7 h的铈锰催化剂表现出最佳的低温还原性能以及具有最多的表面氧物种吸附和脱附量，降低或增加陈化时间均对这两项关键指标产生不利影响。

A series of cerium manganese catalysts are prepared from cerium nitrate and manganese nitrate through coprecipitation method.The effect of aging time on the performance of the catalyst is investigated, and the catalyst is applied to the catalytic combustion of soot particles in exhaust from diesel vehicle.It is shown that the aging time has a significant effect on the performance of cerium manganese catalyst in soot particles combustion.The peak temperature on the activity curve of the catalyst after having been aged for 7 h is 59℃ lower than that of the unaged catalyst.This is mainly because the cerium manganese catalyst with an aging time of 7 h shows the best reduction performance at low temperature, and has the most amount of adsorption and desorption of surface oxygen species.Shortening or prolonging the aging time has adverse impact on these two key indicators.