Enhanced Catalytic Efficiency of CuMn2O4 in Soot Oxidation: An Investigation into Its Synthesis and Characterization

Document Type

Article

Publication Title

Catalysis Letters

Abstract

Abstract: Diesel particulate filters (DPFs) are essential in mitigating soot emissions. In this study, we synthesized a CuMn2O4 catalyst using three distinct methods: sol–gel, hydrothermal, and reflux. The catalysts' structural and morphological characteristics were verified through X-ray diffraction (XRD) and scanning electron microscopy (SEM), while their reducibility properties were assessed via soot-temperature-programmed reduction (TPR). Thermogravimetric analysis (TGA) was employed to evaluate the catalytic performance of each sample in soot oxidation. XRD analysis confirmed the formation of the cubic phase of CuMn2O4 across all synthesis methods. SEM analysis revealed varied morphologies, including coral-shaped, non-uniform-shaped, and aggregated spherical structures. Notably, the hydrothermally prepared CuMn2O4 exhibited a higher concentration of surface-adsorbed oxygen species, a key factor in catalytic activity. The hydrothermally prepared CuMn2O4 exhibited a superior soot oxidation performance due to a higher concentration of surface-adsorbed oxygen species, achieving a T50% of 417 °C. This study highlights the potential of CuMn2O4 catalysts in enhancing the efficiency of DPFs, offering insights into the role of synthesis methods in optimizing catalyst properties for improved environmental applications.

DOI

10.1007/s10562-025-04955-4

Publication Date

4-1-2025

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