The cryptomelane catalysts containing transition metal (M/K-OMS-2, M = Cu, Ni, Co, Cr and Fe) was synthesized and characterized by XRD, TEM/EDX, XRF, XPS, Raman, H2-TPR corroborated by potassium thermal desorption measurements. The catalysts were tested for soot oxidation in tight and loose contact modes in various conditions: O₂, O₂ + NO, O₂ + SO₂, O₂ + NO + SO₂. The alterations in the soot oxidation activity were discussed in terms of manganese average oxidation number, NO₂ formation during the combustion and potassium release, which are modified by the dopants. It was shown that the strong effect of dopants on the NO₂ formation is different in absence and presence of soot, and varies with the type of the sot-catalyst contact, being well corelated with the concurrent CO₂ formation. Sulphur resistance can be enhanced by doping of the cryptomelane. The most efficient is the catalyst containing segregated mixed cobalt-manganese spinel phase.

合成了含过渡金属（M/K-OMS-2，M = Cu、Ni、Co、Cr 和 Fe）的锂锰矿催化剂，并通过 XRD、TEM/EDX、XRF、XPS、拉曼、H2-TPR 进行了表征，并得到了钾的证实热解吸测量。在各种条件下以紧密和松散接触模式测试催化剂的烟灰氧化：O ₂、O ₂ + NO、O ₂ + SO ₂、O ₂ + NO + SO ₂。根据锰平均氧化数、燃烧过程中NO _{2 的}形成和钾的释放，讨论了烟尘氧化活性的变化，这些都被掺杂剂改变了。结果表明，掺杂剂对 NO ₂的强烈影响烟灰的存在和不存在时的形成是不同的，并且随着烟灰-催化剂接触的类型而变化，与同时形成的CO ₂密切相关。通过掺杂锂锰矿可以增强耐硫性。最有效的是含有分离的混合钴锰尖晶石相的催化剂。