The results of the last 20 year research on the development of rare earth cobaltate- and nickelate-based catalysts of the partial oxidation of methane (POM) are summarized. New way of synthesis of these catalysts based on the decomposition of complex oxide precursors in the reducing environment is discussed. It was found that the high mobility of oxygen in LaSrCoO4 is accompanied by a significant catalytic activity of this complex oxide in methane oxidation. High catalytic performance of NdCaCoO4 in POM might be caused by the reductive decomposition of this complex oxide at a temperature above 900 °C and the formation of closely packed agglomerates of nanoparticles of metallic cobalt, Nd2O3, and CaO. The studies focused on decreasing POM temperature via substitution of cobalt by nickel in complex oxide precursors as well as the works considering decomposition processes in order to obtain metal-oxide nanocomposites with the optimum catalytic performance are discussed. This work shows that the reductive decomposition of Nd2−xCax(Co1−yNiy)O4−d and of the related complex oxides opens up new possibilities for the development of metal-oxide catalysts of the partial oxidation of methane and other catalytic oxidation processes.

中文翻译：

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基于钴和镍的钙钛矿状复合氧化物的甲烷氧化催化剂

总结了过去 20 年对甲烷部分氧化 (POM) 稀土钴酸盐和镍酸盐催化剂的研究成果。讨论了基于复合氧化物前体在还原环境中分解的这些催化剂的新合成方法。研究发现，LaSrCoO4 中氧的高迁移率伴随着这种复合氧化物在甲烷氧化中的显着催化活性。NdCaCoO4 在 POM 中的高催化性能可能是由于这种复合氧化物在 900 °C 以上的温度下发生还原分解，并形成金属钴、Nd2O3 和 CaO 纳米颗粒的紧密聚集体。讨论了通过在复合氧化物前体中用镍取代钴来降低 POM 温度的研究以及考虑分解过程以获得具有最佳催化性能的金属氧化物纳米复合材料的工作。这项工作表明，Nd2-xCax(Co1-yNiy)O4-d 和相关复合氧化物的还原分解为甲烷部分氧化和其他催化氧化过程的金属氧化物催化剂的开发开辟了新的可能性。