Low-temperature NO reduction performance of peanut shell-derived few-layer graphene loaded CeCoxMn1-xO3 catalyst

The catalysts were prepared by the hydrothermal method using agricultural waste biomass peanut shell-derived few-layer graphene (PS-FLG) as the support. The NO reduction performance test of NH3-SCR and various characterization means were employed to preliminarily explore the mechanism of Co-doping activity at the B site. The results showed that the conversion rate of NOx of the three catalysts reached 99.1% and remained stable in the range of 250 ∼ 400 °C. The order of activity at low temperature was 5% CeCo0.5Mn0.5O3 > 5% CeMnO3 > 5% CeCoO3. Partial doping of Co could inhibit the aggregation of active components, increase the percentage of high valence ions, improve the migration of lattice oxygen (Oβ) to the adsorbed oxygen (Oα), and enhance the redox performance. CeCo0.5Mn0.5O3 exhibited better low-temperature activity, and the conversion rate of NOx reached 97.0% at 200 °C, and had excellent SO2 resistance.