Dip coating method was utilized for wash-coating alumina onto cordierite honeycomb substrate, followed by catalyst coating by sol–gel dip coating of CMX(X = 0, 5, 70, and 100 corresponding to Ce1-xMnxO2-δ, where x = 0, 0.5, 0.7, and 1) to obtain CM0/Al2O3/Cord, CM5/Al2O3/Cord, CM70/Al2O3/Cord, and CM100/Al2O3/Cord. The sol–gel was obtained from the EDTA–citrate method. XRD, BET, and BJH analysis was conducted on samples Cord to CM100/Al2O3/Cord. An intense peak of ceria at 462.53 cm−1 and that of Mn3O4 was observed at 658 cm−1 in the Raman spectra analysis. The adherence test was conducted to test the mechanical stability of the wash-coat and catalyst layer. The visual evidence of coating was furnished by optical imaging and FESEM analysis. Ultrafine particles with high porosity were observed in sample Al2O3/Cord. Cracks were observed in the FESEM images of CM0/Al2O3/Cord to CM100/Al2O3/Cord samples. CO oxidation studies were performed on the samples Cord to CM100/Al2O3/Cord. CM70/Al2O3/Cord performed the best among all other samples with a T50 temperature of 157 °C. The activation energy of CO oxidation was calculated using the Ozawa method for samples CM0/Al2O3/Cord to CM100/Al2O3/Cord. 50 h long-term CO oxidation stability experiments were also conducted on samples CM0/Al2O3/Cord to CM100/Al2O3/Cord. The synergistic effects of ceria and manganese, combined with fine dispersion of the catalyst, pore characteristics, and cracks improving diffusivity, pitched CM70/Al2O3/Cord to have the best CO oxidation activity. © The Author(s), under exclusive licence to the Institute of Chemistry, Slovak Academy of Sciences 2024.

	views
Dip coating of ceria–manganese mixed oxides on cordierite and its CO oxidation activity	0

	views
November 2025	0
December 2025	0
January 2026	0
February 2026	0
March 2026	0
April 2026	0
May 2026	0

Statistics for Dip coating of ceria–manganese mixed oxides on cordierite and its CO oxidation activity

Total visits

Total visits per month