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Herein, three-dimensional ordered macropore (3DOM) x% W/Ce0.8Zr0.2O2 (x = 0.5, 0.8, 1, 3) catalysts were prepared and employed for the simultaneous removal of PM (particulate matter) and NOx from diesel engine exhaust. The contact between the solid PM and the catalyst active site was strengthened by the special 3DOM structure. 3DOM 0.8% W/Ce0.8Zr0.2O2 had superior catalytic activity with a maximum concentration of CO2 at 408 °C and nearly 100% NO conversion at 378–492 °C, and also presented high catalytic activity even under a high space velocity of 50 000 h−1. Furthermore, the stability of the catalyst was excellent even after aging at 900 °C for 5 h. The large amount of chemisorbed oxygen species, good low temperature reduction performance as well as abundant acid sites enhanced the catalytic efficiency for simultaneous PM and NOx abatement over the 3DOM 0.8% W/Ce0.8Zr0.2O2 material; this is a promising catalyst for application in exhaust purification.

Simultaneous removal of PM and NOx over highly efficient 3DOM W/Ce0.8Zr0.2O2 catalysts

Simultaneous removal of PM and NO_x over highly efficient 3DOM W/Ce_0.8Zr_0.2O₂ catalysts