MnOx-CeO2 mixed oxides for diesel soot oxidation: a review

Catalytic diesel particulate filter is an efficient equipment for particulate matters control downstream of a diesel engine. MnOx-CeO2 mixed oxides are a potential alternative of the high cost commercial platinum catalyst. However, the poor thermal stability and sulfur resistance are two issues challenging its application. Additionally, the mechanism of synergistic effect between manganese oxide and ceria still remained debatable. Here, the catalysis mechanisms in the presence/absence of NOx were reviewed. The origins of synergistic effects were discussed based on whether the solid solutions formed or not. Meanwhile, different kinds of metal modifications were summarized and their promotion influences on the thermal stability and sulfur resistance were clarified in detail. [GRAPHICS] .