Ynthesis And Catalytic Performance Of A Serious Of Novel Perovskite-Type Catalysts

A series of perovskite-type composite oxides Ba-Zr-O,La-Ce-O, Sr-Ce-O, Mg-Ce-O,Ba-Ce-O,La-Zr-O,La-Co-O and Ba-Co-O have been prepared by improvement sol-gel method .and composite oxides Ba-Zr-O,Ba-Ce-O, La-Co-O were also prepared by Coprecipitation and Microemulsion method respevtively.and it was studied that the physical and chemical performance and catalytic performance.Then the catalyst BaZrO₃ which have higher catalytic activity of methane combustion were substitude by La to study the effects of doping La on performance of methane catalytic combustion over BaZrO₃ catalyst . The catalysts were characterized by XRD, BET, FT-IR, H₂-TPR, TEM, Electrical Conductivity, TestMagnetism Test and tested methane combustion activity .The results showed that the single phase perovskite BaCeO₃, BaZrO₃, BaCoO_2.70, SrCeO₃ and LaCoO₃ were obtained for catalysts Ba-Ce-O, Ba-Zr-O, Ba-Co-O, Sr-Ce-O and La-Co-O system respectively after calcined at 1200℃ for 3 hours using improvement in sol-gel method.The BaZrO₃ catalyst showed higher...