Layered δ-MnO₂ was successfully synthesized by redox reaction precipitation between KMnO₄ and n-butanol. Then, the as-synthesized layered δ-MnO₂ was used as catalyst for toluene catalytic combustion and showed excellent catalytic performance. The T₁₀ and T₉₀ (the temperatures corresponded to the toluene conversion of 10 % and 90 %) were just 160 °C and 199 °C, respectively (1000 ppm toluene, GHSV = 60,000 mL/(g h, 20 vol.%O₂/N₂). In addition, the layered δ-MnO₂ showed well catalytic stability and humid resistance. The as-prepared catalysts were characterized by XRD, N₂ sorption, SEM, TEM, XPS, H₂-TPR, O₂-TPD and so on. Compared with the referenced ε-MnO₂ and γ-MnO₂, the higher catalytic activity of layered δ-MnO₂ was ascribed to its higher specific surface area, stronger low-temperature reducibility and richer oxygen vacancy. Finally, the toluene catalytic oxidation mechanism over δ-MnO₂ was also proposed based on the results of in-situ DRIFTs. And the key successively intermediate species for toluene oxidation over δ-MnO₂ were benzyl alcohol, benzoic acid, maleic anhydride and acetate.

层状δ-的MnO ₂已成功的KMnO之间氧化还原反应合成沉淀₄和正丁醇。然后，所合成的层状δ-的MnO ₂用作催化剂甲苯催化燃烧和表现出优异的催化性能。T ₁₀和T ₉₀（温度对应于10％和90％的甲苯转化率）分别仅为160°C和199°C（1000 ppm甲苯，GHSV = 60,000 mL /（gh，20 vol。％O ₂ / N ₂）。另外，该层状δ-的MnO ₂显示良好的催化稳定性和湿润性。所制备的催化剂进行了表征通过XRD，N ₂吸附，SEM，TEM，XPS，H₂ -TPR，O ₂ -TPD等。与引用的ε-相比的MnO ₂和γ-MnO的₂，分层的δ的MnO的较高的催化活性₂是归因于它的高的比表面积，更强的低温还原性和更丰富的氧空位。最后，在δ-MnO的甲苯催化氧化机构₂基于该结果还提出原位漂移。和键依次中间物质对甲苯过氧化δ-的MnO ₂是苄醇，苯甲酸，马来酸酐和乙酸盐。