Effect of different coatings on the structure and performance of three-dimensional ordered macropores LaCeCoO catalysts.

In this work, monolithic catalysts with single coating CeZrO, AlO and composite coating CeZrO-AlO were prepared by PMMA hard template-excessive impregnation method with 3DOM LaCeCoO as the active component and cordierite as the carrier, and characterized by SEM, XRD, BET, H-TPR, and XPS, and the catalytic performance for toluene was tested. The results showed that the active components of 3DOM LaCeCoO/CeZrO-AlO/cordierite catalyst were highly dispersed, forming a complete macroporous structure with the largest specific surface area (10.57 m·g), high surface adsorbed oxygen concentration, and good low-temperature reducibility. Its catalytic activity (T = 103℃, T = 218℃) for toluene was obviously better than the others. According to the comprehensive analysis, the improvement of the performance of the catalyst may benefit from the excellent physicochemical properties and the synergistic effect between CeZrO-AlO composite coating and active components.