Manganese oxides are considered to be highly effective catalysts for the oxidation of volatile organic compounds (VOCs). A series of MnO₂/montmorillonite composites was prepared to test their catalytic activity in the combustion of model compounds - toluene and ethanol. Several different types of montmorillonites (Mt), referred to as STx-1b, SWy-2, SAz-2, and Kunipia- F, were used to prepare the composites. The MnO₂/Mt composites were synthetized in a weight ratio of 1:1, using the reaction between KMnO₄ and HCl for the generation of the MnO₂ component. Advanced techniques including XRD, SEM/EDS, IR spectroscopy, N₂ adsorption/desorption, and H₂ TPR were used for physico-chemical characterization of obtained materials. The MnO₂ component precipitated as cryptomelane, the tunnel α-MnO₂ structure. In catalytic tests, all composite samples were more active than the reference MnO₂. The performance of composites in toluene oxidation was correlated with their reducibility. In the case of ethanol, it is suggested that catalytic activity is additionally affected by differences in the distribution of potassium between the Mt and the cryptomelane caused by the different cation exchange capacity (CEC) of montmorillonites. Lower CEC of clay mineral leads to a higher share of potassium in MnO₂ enhancing thereby its basicity, which is favorable for ethanol combustion.

锰氧化物被认为是用于挥发性有机化合物（VOC）氧化的高效催化剂。制备了一系列MnO ₂ /蒙脱土复合材料，以测试它们在燃烧模型化合物（甲苯和乙醇）中的催化活性。几种不同类型的蒙脱土（Mt），分别称为STx-1b，SWy-2，SAz-2和Kunipia-F，用于制备复合材料。利用KMnO ₄和HCl之间的反应生成MnO ₂组分，以1：1的重量比合成了MnO ₂ / Mt复合材料。先进技术，包括XRD，SEM / EDS，IR光谱，N ₂吸附/解吸和H ₂TPR用于获得的材料的物理化学表征。MnO的₂成分沉淀为锰钾矿，隧道α-MnO的₂结构。在催化测试中，所有复合样品的活性均高于参比MnO ₂。复合材料在甲苯氧化中的性能与其可还原性相关。在乙醇的情况下，建议催化活性还受蒙脱土的不同阳离子交换容量（CEC）引起的Mt和隐甲烷之间钾分布差异的影响。粘土矿物的较低的CEC导致MnO ₂中钾的含量更高，从而增强了其碱性，这对于乙醇燃烧是有利的。