An important decrease in the soot combustion temperature was observed by employing potassium and manganese on ZrO₂ as support; significantly boosted soot combustion was obtained with the K/ZrO₂ and Mn–K/ZrO₂ catalysts for T₅₀ at 295 and 240 °C, respectively. The enhanced catalytic activity by using the Mn–K/ZrO₂ catalyst could be attributed to the alkaline metal ion, which improved the catalyst/soot contact. XPS results revealed the presence of surface vacancies, where the addition of manganese improved the lattice oxygen and concentration of OH groups on the Mn–K/ZrO₂ catalyst at low temperatures; the presence of surface vacancies was facilitated by the interaction between potassium and manganese. The Mn–K/ZrO₂ catalyst showed resistance to deactivation for five cycles.

通过在ZrO ₂上使用钾和锰作为载体，可以观察到烟灰燃烧温度的显着降低。用K / ZrO ₂和Mn-K / ZrO ₂催化剂分别在295和240°C的T ₅₀可获得显着促进的烟尘燃烧。通过使用Mn-K / ZrO ₂催化剂提高的催化活性可以归因于碱金属离子，从而改善了催化剂/烟灰接触。XPS结果表明存在表面空位，其中添加锰改善了Mn–K / ZrO ₂上的晶格氧和OH基团的浓度低温催化剂；钾和锰之间的相互作用促进了表面空位的存在。Mn-K / ZrO ₂催化剂在五个循环中均表现出抗失活性。