采用等体积浸渍法制备了一系列Mn₁Co_2.3复合物负载不同质量分数Ag颗粒的催化剂,并用于碳烟颗粒的催化燃烧。结果表明,制得的Ag(10)-Mn₁Co_2.3在松散接触模式以及10% O₂/Ar+10% H₂O(g)+500 μL/L NO_<i>x辅助气氛条件下表现出最佳的催化活性,其T₁₀、T₅₀和T₉₀分别为293、338℃和375℃。负载Ag不仅提高了催化剂的本征活性,而且Mn₁Co_2.3所具有的多孔纳米片形貌使该催化剂与反应物之间具有良好的固-固接触效率。

A series of catalysts with different amounts of Ag loaded on Mn₁Co_2.3 are prepared via the equal volume incipient wetness impregnation method,and applied in the catalytic combustion of soot particles.The test results show that the prepared Ag(10)-Mn₁Co_2.3 exhibits the best catalytic activity under loose contact mode with 10% O₂/Ar+10% H₂O(g)+500 μL·L^-1 NO_x auxiliary atmosphere,and its T₁₀,T₅₀ and T₉₀ are 293℃,338℃ and 375℃,respectively.The good performance might be due to that the loaded Ag improves the intrinsic activity of the catalysts,while the porous nanosheet morphology of Mn₁Co_2.3 allows a good contact efficiency between the catalyst and soot.

胡苗苗(1998-),女,硕士生,研究方向为柴油机尾气污染控制,humiaomiao1016@163.com。