中文摘要：

摘要：通过溶胶一凝胶法制备了贵金属Ru掺杂的系列钙钛矿型La0.7Sr0.3Co1-xRuxO3催化剂，进行了XRD和H2-TPR的表征，并进行了NOx储存和NOx储存还原的测试。通过表征发现，催化剂在掺杂了Ru之后，钙钛矿型结构保持得更加完整，单一氧化物的偏析受到了抑制。在325℃下，催化剂具有比较宽的NOx吸附阱，在储存还原测试中NOx吸附能力比较强。碳酸锶物种是NOx的主要吸附位，在Ru的掺杂下，其含量下降，以碳／氮比值为标志的对NOx吸附的贡献量减小。

英文摘要：

A series of Ru-doped perovskite-type La0.7Sr0.3Co1-xRuxO3 catalysts was synthesized using sol- gel method. The samples were characterized with XRD and H2-TPR. The results showed that the struc- tures of perovskite became more integrated than that of the undoped perovskite, and the segregation of the unitary oxides of the component metal ions was suppressed with Ru doping. The catalysts performed a storage trap of NO with a considerable trap width, as well kept a good storage capacity of NOx during storage-reduction test all under 325℃. The strontium carbonate was the major adsorption site of NOx, and its proportion decreased as Ru doping, with the contribution to NOx adsorption declining indicated by the parameter of carbon-nitrogen ratio.