Herein N_(2)O decomposition over LaMO_(3)(M:Fe,Co,Ni)mixed oxides with perovskite structures has been optimized.The influence of the organic additive and the additive to(La^(3+)+Co^(2+))molar ratio on phase compositio...Herein N_(2)O decomposition over LaMO_(3)(M:Fe,Co,Ni)mixed oxides with perovskite structures has been optimized.The influence of the organic additive and the additive to(La^(3+)+Co^(2+))molar ratio on phase composition,particle aggregate size,textural properties,and catalytic activity of LaCoO_(3)has been determined for the first time.Glycine improved the phase purity of LaCoO_(3),enhanced the specific surface area and pore volume,and shifted the pore size distribution to the wider mesopore and macropore regions.LaCoO_(3)showed better activity than LaFeO_(3)and LaNiO_(3)owing to the greater reducibility of Co^(3+)and its large specific surface area,and correlations between the La^(3+):Co^(2+)molar ratio,particle aggregate size,pore volume for pores larger than 25 nm,and N_(2)O decomposition activity for LaCoO_(3)have been determined.Changes in the LaCoO_(3)textural properties following catalytic experiments with 10%water vapor added to the feed have also been analyzed here-in.展开更多
基金supported by the Russian Science Foundation(Grant No.23-73-30007).
文摘Herein N_(2)O decomposition over LaMO_(3)(M:Fe,Co,Ni)mixed oxides with perovskite structures has been optimized.The influence of the organic additive and the additive to(La^(3+)+Co^(2+))molar ratio on phase composition,particle aggregate size,textural properties,and catalytic activity of LaCoO_(3)has been determined for the first time.Glycine improved the phase purity of LaCoO_(3),enhanced the specific surface area and pore volume,and shifted the pore size distribution to the wider mesopore and macropore regions.LaCoO_(3)showed better activity than LaFeO_(3)and LaNiO_(3)owing to the greater reducibility of Co^(3+)and its large specific surface area,and correlations between the La^(3+):Co^(2+)molar ratio,particle aggregate size,pore volume for pores larger than 25 nm,and N_(2)O decomposition activity for LaCoO_(3)have been determined.Changes in the LaCoO_(3)textural properties following catalytic experiments with 10%water vapor added to the feed have also been analyzed here-in.
