Low-Temperature CO Oxidation over CuO-CeO2/Fe2O3 Catalyst: Effect of KMnO4 Modification

In this paper, the effect of KMnO4 modification on the performance of CO oxidation over a CuCeOx/Fe2O3 catalyst in industrial flue gas was studied. X-ray diffraction (XRD), scanning electron microscopy (SEM), temperature-programmed reduction by H-2 (H-2-TPR), Fourier transform infrared spectroscope (FTIR), and Raman spectra were employed to reveal the relationship between the structural properties and the performance of the catalyst. The results show that the catalytic activity could be increased by KMnO4 modification. CuCeOx/Fe2O3 modified with 0.07 mol/L KMnO4 exhibited high activity, with a CO conversion of 78.2% at 160 degrees C. The modification of KMnO4 reduced the grain size and promoted the uniform dispersion of active particles. In addition, the number of oxygen-containing functional groups increased, which could anchor metal particles and provide active oxygen species for CO oxidation.

Automated summary

In this paper, the effect of KMnO4 modification on the performance of CuCeOx/Fe2O3 catalyst for CO oxidation in industrial flue gas was investigated. Various analytical techniques were employed to reveal the relationship between the structural properties and the catalyst performance. The results showed that KMnO4 modification led to an increase in catalytic activity, with 0.07 mol/L KMnO4 modified CuCeOx/Fe2O3 catalyst exhibiting a CO conversion of 78.2% at 160 degrees C. The modification also resulted in reduced grain size and improved dispersion of active particles, as well as an increase in oxygen-containing functional groups for anchoring metal particles and providing active oxygen species for CO oxidation.