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A series of Mn-promoted BaAl2O4 catalysts were developed for catalytic soot combustion. These catalysts were characterized using XRD, BET, H2-TPR, O2-TPD, and in-situ DRIFTS. The results showed that an optimized combustion catalyst should accommodate barium and manganese with proper balance to promote soot combustion. A synergistic mechanism was suggested to explain the synergistic effect of manganese and barium: NO was trapped mainly as nitrites by barium, while the generated nitrites further transformed to nitrates facilitated by manganese, which finally oxidized soot into CO2.
该文章中材料表征采用的是美国麦克仪器ASAP 2460
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