Influence of interactions between chromium and cerium on catalytic performances of CrO x -CeO2/Ti-PILC catalysts for deep oxidation of n-butylamine

A series of CrO (x) -CeO2/Ti-PILC (PILC is pillared interlayered clay) catalysts for n-butylamine oxidation were prepared using an impregnation method, and the structures, surface acidity distributions, and redox properties of the catalysts were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, H-2 temperature-programmed reduction, and NH3 temperature-programmed desorption. The results show that addition of an appropriate amount of CeO2 enhances the interactions between Cr and Ce, and this increases the acid strength and mobility of active oxygen species on the catalyst. 8CrCe(6:1)/Ti-PILC(12,20) exhibits the best catalytic performance and control of NO (x) in n-butylamine oxidation.