▎ 摘　　要

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 similar to 400 degrees 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 (O-beta) to the adsorbed oxygen (O-alpha), and enhance the redox performance. CeCo0.5Mn0.5O3 exhibited better low-temperature activity, and the conversion rate of NOx reached 97.0% at 200 degrees C, and had excellent SO2 resistance.