采用两步水热法制备α-MnO₂/Mn₂O₃/AISI304丝网整体式催化剂，首先通过尿素水热法在AISI304丝网上生长Mn₂O₃涂层；然后在涂层表面原位生成以α-MnO₂为活性组分的催化剂。利用XRD、SEM、N₂吸附-脱附、H₂-TPR等对催化剂进行表征，考察了不同焙烧温度对整体式催化剂结构和碳烟催化燃烧性能的影响。结果表明，焙烧温度为700℃时，Mn-Nit-700的活性组分以α-MnO₂纳米棒为主，具有更加丰富的表面活性氧物种（焙烧温度<500℃），有利于碳烟的催化燃烧反应。在O₂/N₂氛围下，Mn-Nit-700催化剂的催化燃烧碳烟性能最佳（T₅₀=388℃），CO₂选择性为100%，同时具有较佳的抗水性能。

A two-step hydrothermal method is utilized to prepare α-MnO₂/Mn₂O₃/AISI304 wire-mesh monolithic catalyst.Firstly,Mn₂O₃ coating grows on AISI304 wire-mesh through urea hydrothermal method,then the catalyst with α-MnO₂ as active component generates in situ on the coating surface.The as-prepared catalyst is characterized by XRD,SEM,N₂ adsorption-desorption,and H₂-TPR,et al.Effects of different roasting temperatures on the monolithic catalyst's structure and catalytic combustion performance for soot are investigated.It is shown that α-MnO₂ nanorods are the main active components of Mn-Nit-700 when the roasting temperature is 700℃.Mn-Nit-700 has more abundant surface active oxygen species (<500℃),which is beneficial to the catalytic combustion of soot.In an O₂/N₂ atmosphere,Mn-Nit-700 catalyst shows the best catalytic performance for soot combustion (T₅₀=388℃) with excellent water tolerance,and CO₂ selectivity can reach 100%.