Three Ru/CeO₂ samples are prepared using the deposition-precipitation method and then ball milled and subsequently calcined at 300 °C. It is demonstrated that the ball milling treatment results in a change of Ru valence and a strong interaction with CeO₂ to form a Ru–O–Ce solid solution. The CO oxidation rate can be drastically improved with ball milling treatment. Specifically, comparing to 0.5Ru/CeO₂, 0.5Ru/CeO₂–BM demonstrates a 3-fold increase in activity at low reaction temperatures up to 100 °C. The superior activity of the ball-milled catalysts can be well correlated to the increase of oxygen vacancies on the catalyst surface. It is inferred that ball milling treatment is a promising approach to enhance the catalytic efficiency of Ru/CeO₂ catalysts, which may provide valuable guidance for improving related catalytic systems.

中文翻译：

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通过球磨活化提高 Ru/CeO2 的 CO 氧化活性


使用沉积-沉淀法制备了三个 Ru/CeO ₂ 样品，然后球磨并随后在 300 °C 下煅烧。结果表明，球磨处理导致Ru价态发生变化，并与CeO ₂ 发生强烈相互作用，形成Ru-O-Ce固溶体。通过球磨处理可以显着提高CO氧化率。具体而言，与 0.5Ru/CeO ₂ 相比，0.5Ru/CeO ₂ –BM 在高达 100 °C 的低反应温度下活性提高了 3 倍。球磨催化剂的优异活性与催化剂表面氧空位的增加密切相关。推测球磨处理是提高Ru/CeO ₂ 催化剂催化效率的一种有前景的方法，可为改进相关催化体系提供有价值的指导。