Abstract Effect of composition and morphology on the catalytic activity in CO oxidation of Co-, Cu-, Ce-containing oxide materials prepared by citrate method has been studied. It was shown that composites consist of well-dispersed oxides Со3O4, CuO and CeO2 with average crystallite sizes 13–24 nm, 14–26 nm and 3–7 nm, respectively. It was established that Co-, Cu-, Ce-oxide nanocomposites demonstrated higher catalytic activity in CO oxidation in comparison with individual oxides. The ternary oxide system Со3O4–CuO–СеO2 (Со:Cu:Се=10:1:1) was found to possess the highest catalytic activity due to formation finely dispersed particles of CuO and СеO2 oxides simultaneously with nanosized Со3O4 species and formation of large quantity of mobile oxygen at the interfaces between the oxide nanoparticles.

中文翻译：

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用于催化 CO 氧化的纳米级氧化物复合材料的开发

摘要 研究了成分和形貌对柠檬酸盐法制备的含Co、Cu、Ce氧化物材料的CO氧化催化活性的影响。结果表明，复合材料由分散良好的氧化物 Со3O4、CuO 和 CeO2 组成，平均晶粒尺寸分别为 13-24 nm、14-26 nm 和 3-7 nm。已经确定，与单独的氧化物相比，Co-、Cu-、Ce-氧化物纳米复合材料在 CO 氧化中表现出更高的催化活性。三元氧化物系统 Со3O4–CuO–СеO2 (Со:Cu:Се=10:1:1) 被发现具有最高的催化活性，因为同时形成了精细分散的 CuO 和 СеO2 氧化物颗粒以及纳米尺寸的 Со3O4 物种并形成了大的氧化物纳米颗粒之间界面处的流动氧量。