Synthesis of LaxK1–xCoO3 nanorod and their catalytic performances for CO oxidation
来源期刊：Journal of Rare Earths2014年第2期
论文作者：刘坚 王季秋 赵震 徐春明 韦岳长 段爱军 姜桂元
文章页码：170 - 175
摘 要：A series of Lax K1–x CoO3 nanorod oxides with perovskite structure were synthesized by sol-gel method using polyvinyl alcohol（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 nanorods of La1–x Kx CoO3 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 Lax K1–x CoO3 catalysts had high activity.LaCoO3 nanorods exposed more {110} plane than LaCoO3 nanoparticles,which was beneficial to the catalytic oxidation of CO.LaCoO3 nanorods had the best catalytic performance for the oxidation of CO.At 200 oC,the CO conversion could reach 100%.
刘坚，王季秋，赵震，徐春明，韦岳长，段爱军，姜桂元
State Key Laboratory of Heavy Oil,College of Science,China University of Petroleum
摘 要：A series of Lax K1–x CoO3 nanorod oxides with perovskite structure were synthesized by sol-gel method using polyvinyl alcohol（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 nanorods of La1–x Kx CoO3 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 Lax K1–x CoO3 catalysts had high activity.LaCoO3 nanorods exposed more {110} plane than LaCoO3 nanoparticles,which was beneficial to the catalytic oxidation 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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