A series of LaxK1-xCoO3 nanorod oxides with perovskite structure were synthesized by sol-gel method using polyvinyl al-cohol (PVA) as additive. These perovskite-type complex oxide catalysts were characterized by the techniques of X-ray diffraction (XRD), infrared (IR), Brumauer-Emmett-Teller (BET) and scanning electron microscopy (SEM). And the results showed that nano-rods of La1-xKxCoO3 perovskite-type complex oxides were fabricated by sol-gel method when the mass concentration of PVA was 4%and the calcined temperature kept at 700 ℃ for 4 h. The catalytic results of CO oxidation showed that the LaxK1-xCoO3 catalysts had high activity. LaCoO3 nanorods exposed more{110}plane than LaCoO3 nanoparticles, which was beneficial to the catalytic oxi-dation of CO. LaCoO3 nanorods had the best catalytic performance for the oxidation of CO. At 200 oC, the CO conversion could reach 100%.
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