No abstract

No abstract

Abstract. The morphological characterization of a series of cobalt-cerium oxide composites prepared by the deposition of CeO 2 onto Co 3 O 4 powder with a molar ratio of cerium oxide to Co 3 O 4 in the range of 0 to 1 was performed. The powders were also impregnated with a solution of K 2 CO 3 to obtain the theoretical content of potassium atoms 2at•nm -2 . To investigate the effect of adding specific amount of CeO 2 on the catalytic activity, the X-ray diffraction, SEM-EDX, laser particle size distribution and BET surface area measurements were used. The catalysts were tested through the low-temperature decomposition of nitrous oxide in the temperature range of 50°C to 700°C. The addition of CeO 2 and K always moved the temperature of a complete N 2 O conversion towards lower temperatures (480°C-540°C to 340°C-420°C). The best catalytic properties were shown by the samples in which the ratio of cerium oxide to cobalt oxide ranged from 0.4 to 0.7.

No abstract