Enhancement of CO-SCR performance achieved by electronic metal-support interaction

Abstract

The selection of an appropriate support material plays a critical role in determining the catalytic performance of molded catalysts for CO-selective catalytic reduction of NO (CO-SCR). While previous research has predominantly focused on the physical supporting characteristics of carriers, insufficient attention has been paid to the intrinsic influence of support materials on catalytic functionality. Herein, we selected copper foil (CF) as the carrier based on the superior stability and certain mechanical strength, and successfully prepared MOF@POM/CF precursor via in-situ hydrothermal method. Furthermore, a series of molded catalysts (Cu/CF-300, Cu/CF-400 and Cu/CF-550) were obtained via high-temperature pyrolysis on 300, 400 and 550 °C, in which the Cu/CF-300 performed 85 % NO conversion rate at 350 °C and complete removal at 400 °C with the GHSV of 15,000 h⁻¹. Systematic characterization revealed that the electronic metal-support interaction (EMSI) not only facilitates homogeneous dispersion of active metallic sites but also effectively regulate the electron transfer and chemical properties of active metals, thereby enhancing the CO-SCR reaction kinetics. Furthermore, the Cu/CF-300 catalyst exhibited remarkable resistance to oxygen poisoning, indicating promising practical applicability.