【摘要】 将原料Ni（NO₃）₂·6H₂O、Mn₃O₄粉末和拟薄水铝石用球磨机球磨,以所得的浆料浸渍堇青石,经过焙烧,得到不同比例的NiO/Mn₃O₄催化剂。通过催化分解臭氧活性测试发现,在空速为20000 h^-1时,30NiO/Mn₃O₄（NiO占总质量的30%）催化剂的活性最高,臭氧分解率达到98%,催化剂活性稳定。当提高空速为40000 h^-1,50NiO/Mn₃O₄（NiO占总质量的50%）催化剂的活性最高,臭氧分解率在90%左右,并且出现失活现象。通过X射线衍射（XRD）、程序升温（TPR）、X射线光电子能谱分析（XPS）、BET比表面积法等表征,发现Mn₃O₄和NiO复合催化剂的比表面积大于单一金属氧化物催化剂的比表面积并且在Mn₃O₄和NiO复合催化剂中Mn₃O₄与NiO发生电子相互作用。催化剂中的Mn₃O₄与NiO的协同催化作用。使得Mn₃O₄与NiO混合物催化剂的还原温度降低,分解臭氧（O₃）活性提高。更多还原

【Abstract】 A series of NiO/Mn₃O₄ monolithic catalysts with different NiO contents was prepared by ballmilling of Ni（NO₃）2·6H₂O, Mn₃O₄ and pseudo boehmite precusors via subsequent impregnation with cordierite,followed by calcination. These catalysts were tested for ozone decomposition. It was found that the 30 NiO/Mn₃O₄（ mass fraction of NiO in total mass is 30%） catalyst has the highest activity at a space velocity of 20000 h^-1,and leads to 98% conversion of ozone,while the catalyst remains stable. When the space velocity is increased to 40000 h^-1,the 50 NiO/Mn₃O₄（ mass fraction of NiO in total mass is 50%） catalyst gives the highest activity,with a ozone conversion at about 90%. But the catalyst suffers deactivation.Characterizations by X-ray diffraction（ XRD）,TPR,XPS and BET reveal that the presence of Mn₃O₄ in the NiO increases the specific surface area of the catalyst,and electronic interaction between Mn₃O₄ and NiO.Meanwhile,the co-presence of Mn₃O₄ and NiO in the catalyst results in facile reduction of these oxides. This synergy is believed to be responsible for the enhanced catalytic performance.更多还原