The Cu–Mn interaction in copper–manganese composite oxide catalysts is crucial for their catalytic oxidation activity of volatile organic compounds (VOCs). In this study, highly dispersed copper–manganese coprecipitates were synthesized using a microreactor, and the effects of feeding intervals on the structure of the precipitates and catalysts were investigated by means of X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results indicate that sequential feeding can produce coprecipitates with better uniformity. An appropriate time difference between the Mn²⁺ and Cu²⁺ feeds can make the coprecipitate more uniform and enhance the Cu–Mn interactions in the catalyst. Higher ratios of both surface Mn³⁺/Mn⁴⁺ and O_latt/O_ads are considered attributable to better catalytic performance.

中文翻译：

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使用顺序进料微反应器制备铜-锰催化剂


铜-锰复合氧化物催化剂中的 Cu-Mn 相互作用对于其挥发性有机化合物 （VOC） 的催化氧化活性至关重要。在本研究中，使用微反应器合成了高度分散的铜-锰共沉淀物，并通过 X 射线衍射 （XRD）、拉曼光谱和 X 射线光电子能谱 （XPS） 研究了进料间隔对沉淀物和催化剂结构的影响。结果表明，顺序饲喂可以产生均匀性更好的共浸料。Mn²⁺ 和 Cu²⁺ 原料之间的适当时间差可以使共沉淀物更加均匀，并增强催化剂中的 Cu-Mn 相互作用。较高的表面 Mn³⁺/Mn⁴⁺ 和 O_latt/O_广告比例被认为归因于更好的催化性能。