3DOMAl2O3担载Pt@MnO2核壳纳米颗粒催化剂的制备、表征及其催化炭烟催化炭烟燃烧性能

In this paper, the three-dimensional ordered macroporous alumina is the carrier due to improve the contact efficiency between soot and catalyst, platinum and manganese dioxide nanoparticles is active component, 3DOM oxides supported Pt@MnO2 nanoparticles catalysts were designed and synthesized. The catalysts structures were characterized by means of XRD, BET, SEM and TEM. And the catalytic activitives of the catalysts for model soot combustion were evaluated by a technique of the temperature-programmed oxidation reaction. The experimental results show that 3DOM Pt@MnO2/Al2O3 catalysts synthesized by the gas bubbling-assisted membrane reduction-precipitation (GBMR/P) method have ordered macroporous structure, the pore sizes of all samples are more than 200nm, and the supported Pt@MnO2 nanoparticles show clearly core-shell structure. 3DOM Pt@MnO2/Al2O3 catalysts show high catalytic activity for soot combustion, and also exhibit the good stability of catalytic activity and core-shell structure.