The perovskite-type solid oxides (ABO3) were a novel kind of functional material with superior properties and have found wide application. A series of nanocrystalline mixed oxides LnFexCo1-xO3 (Ln=La, Pr, Sm, Dy, Er)w...The perovskite-type solid oxides (ABO3) were a novel kind of functional material with superior properties and have found wide application. A series of nanocrystalline mixed oxides LnFexCo1-xO3 (Ln=La, Pr, Sm, Dy, Er)were prepared by sol-gel method. Several aspects of the perovskite type LnFexCo1-xO3, such as crystal defects, oxygen ion vacancy, the tolerance factor of the ABO3, col size, and the bond energy of chemical bond, searching for the relationship between the conductivity and structure of the perovskite type LnFexCo1-xO3, hoping to find some regularities in theory, and providing some helps for composing new type of electricity materials.展开更多
in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in...in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in A site composition La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_3MnO_3 is the mostactive catalysts for 1 v% CH_4 and 2 v% CH_4 respectively. But LaMn_(0.5)Co_(0.5)O_3 oxide is the best ac-tive catalyst for 1-2v% CH_4 among the oxides by changing B site compositions of LaBO_3 and su-perior to La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_(0.4)MnO_3 catalysts.Adding trace Pd improved the activity and characteristics of space velocity for LaMn_(0.5)CO_(0.5)O_3and La_(0.3)Sr_(0.2)MnO_3 Although LaMn_(0.5)Co_(0.5)O_3 +Pd (0.03 wt%) was less active than the Pd catalyst,the activity was more than Pt catalyst at a conversion level below 90%.展开更多
基金the High College-Technology Research Foundation of Shanxi Province (200611022)
文摘The perovskite-type solid oxides (ABO3) were a novel kind of functional material with superior properties and have found wide application. A series of nanocrystalline mixed oxides LnFexCo1-xO3 (Ln=La, Pr, Sm, Dy, Er)were prepared by sol-gel method. Several aspects of the perovskite type LnFexCo1-xO3, such as crystal defects, oxygen ion vacancy, the tolerance factor of the ABO3, col size, and the bond energy of chemical bond, searching for the relationship between the conductivity and structure of the perovskite type LnFexCo1-xO3, hoping to find some regularities in theory, and providing some helps for composing new type of electricity materials.
文摘in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in A site composition La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_3MnO_3 is the mostactive catalysts for 1 v% CH_4 and 2 v% CH_4 respectively. But LaMn_(0.5)Co_(0.5)O_3 oxide is the best ac-tive catalyst for 1-2v% CH_4 among the oxides by changing B site compositions of LaBO_3 and su-perior to La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_(0.4)MnO_3 catalysts.Adding trace Pd improved the activity and characteristics of space velocity for LaMn_(0.5)CO_(0.5)O_3and La_(0.3)Sr_(0.2)MnO_3 Although LaMn_(0.5)Co_(0.5)O_3 +Pd (0.03 wt%) was less active than the Pd catalyst,the activity was more than Pt catalyst at a conversion level below 90%.
