The effect of B-site partial substitution on the structure and the catalytic performance of cobalt-based double perovskites (La₂BCoO₆ where B = Cu, Ni and Fe) was investigated in the catalytic combustion of methane. The synthesized samples were characterized using XRD, XRF, N₂-physisorption, H₂-TPR, O₂-TPD, CH₄-TPR and XPS techniques. The XRD results showed the successful synthesis of cobalt-based double perovskites with single phase and rhombohedral structure. The incorporation of Ni, Cu and Fe created abundant oxygen vacancies on the double perovskites which improved oxygen mobility and reducibility and accordingly increased the catalytic activity. The catalytic activity of synthesized samples was in the order of La₂CuCoO₆ > La₂NiCoO₆ > La₂FeCoO₆ > LaCoO₃. The better activity of La₂CuCoO₆ was owing to the presence of the highest oxygen species, the highest reducibility and the highest oxygen mobility.

在甲烷的催化燃烧中，研究了B位部分取代对钴基双钙钛矿（La ₂ BCoO ₆，其中B = Cu，Ni和Fe）的结构和催化性能的影响。使用XRD，XRF，N _2-物理吸附，H ₂ -TPR ，O ₂ -TPD，CH ₄表征合成的样品-TPR和XPS技术。XRD结果表明成功合成了具有单相和菱形结构的钴基双钙钛矿。Ni，Cu和Fe的掺入在双钙钛矿上产生大量的氧空位，这改善了氧的迁移率和还原性，并因此提高了催化活性。合成样品的催化活性依次为La ₂ CuCoO ₆  > La ₂ NiCoO ₆  > La ₂ FeCoO ₆  > LaCoO ₃。La ₂ CuCoO _6的活性更好是由于存在最高的氧种类，最高的还原性和最高的氧迁移率。