采用尿素水解法制备了Pd-MnOx/Al2O3催化剂,运用低温N2吸附-脱附和X射线衍射对其进行了表征,并评价了其催化降解地表O3反应活性,考察了Pd,MnOx焙烧时间和MnOx含量刘催化剂活性的影响.结果表明,在高空速(660000h-1)、高相对湿度(85%~90%)条件下,MnOx焙烧时间为6h且.MnOx含量为80%的Pd-MnOx/Al2O3催化剂于低温(20~25 ℃)就表现出较高的催化活性,20℃时O3转化率就高达91.7%,其完全转化温度为24℃.可以预知该催化剂涂覆在汽车水箱散热片上,于室温就可完全降解地表O3,尤其适用于汽车冷启动和冬季时净化O3.
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