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—Mechanochemical synthesis in a ball mill was applied for the nanocomposite Cu(CuO)–CeO₂ catalyst preparation from CeO₂ and following dopants: Cu metal and copper oxides of different morphology and composition (CuO pure and CuO containing 4 or 16.5 wt % of Cu₂O). The materials obtained were examined with the use of X-ray phase analysis, scanning electron microscopy, temperature-programmed reduction in CO, H₂, C₂H₆ (TPR-СО, TPR-Н_2, and TPR-С₂Н₆), and tested as catalysts in reactions of selective CO oxidation in H₂ excess (CO-PROX) and total C₂H₆ oxidation. New forms of oxygen with high low-temperature reactivity towards CO, H₂, and C₂H₆ were found by TPR in the samples synthesized. It was shown that CO conversion was slightly affected by the dopant nature in the dopant-CeO₂ mixture. Contrary, C₂H₆ conversion at low temperatures depends on dopant composition. The highest C₂H₆ conversion at 400°С (91.4%) was observed on Cu–CeO₂. The lowest one (54.2%) was observed on CuO–CeO₂. As was demonstrated, mechanochemical synthesis is a universal technique to produce copper oxide–ceria catalysts.

中文翻译：

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机械化学合成作为制备复合催化剂的另一种有效技术

Abstarct

-在球磨机中进行机械化学合成，以用于由CeO ₂和以下掺杂剂制备纳米复合Cu（CuO）-CeO ₂催化剂：不同形态和组成的Cu金属和铜氧化物（CuO纯和CuO含量为4或16.5 wt％ Cu ₂ O）。所获得的材料与使用X射线相位分析进行了检查，扫描电子显微镜，在CO，H程序升温还原₂，C ₂ H ^ ₆（TPR-СО，TPR-Н _2，和TPR-С ₂ Н ₆），并在过量H ₂（CO-PROX）和总C ₂ H₆氧化。通过TPR在合成的样品中发现了对CO，H ₂和C ₂ H ₆具有高低温反应性的新型氧。已经表明，CO-转化率受掺杂剂-CeO ₂混合物中的掺杂剂性质的轻微影响。相反，低温下的C ₂ H ₆转化率取决于掺杂剂组成。在Cu–CeO ₂上观察到最高的C ₂ H ₆转化率在400°С（91.4％）。在CuO–CeO ₂上观察到最低的一种（54.2％）。如所证明的，机械化学合成是生产氧化铜-二氧化铈催化剂的通用技术。