Hetero-Shelled Hollow Structure Coupled with Non-Thermal Plasma Inducing Spatial Charge Rearrangement for Superior NO Conversion and Sulfur Resistance

Facilitating the mass transfer and spatial charge separation is a great challenge for achieving efficient oxidation of NO and outstanding sulfur resistance. Herein, a hydrothermal-assisted confinement growth technique is used to fabricate well-defined three-dimensional CuOx@MnOx hetero-shelled hollow-structure catalysts. By integrating the coupled plasma space reactor and the porous hierarchical structure of the catalyst, excellent stability (10 h) and high conversion of NO (93.86%) are reached under the concentration of SO2 (1000 mg m(-3)) and NO (200 mg m(-3)). Impressively, precise surface characterization and detailed density functional theory calculations show that the spatial hetero-shelled micro-reactor can orient the redox pairs transportation, facilitating the combination of NO with the surface coordinately unsaturated O atoms, and also prevent the poisoning of SO2 molecules due to the curvature and surface charge effect in the non-thermal plasma equipment.

Automated summary

Mass transfer and spatial charge separation pose significant challenges for efficient oxidation of NO and resistance to sulfur. In this study, a hydrothermal-assisted confinement growth technique was used to fabricate three-dimensional CuOx@MnOx hetero-shelled hollow-structure catalysts. By combining the plasma space reactor and porous hierarchical structure, high stability and conversion of NO were achieved under high concentrations of SO2 and NO. Surface characterization and theoretical calculations showed that the hetero-shelled micro-reactor facilitated the transportation of redox pairs and prevented the poisoning of SO2 molecules.