| 초록 |
N2O is an important environmental issue due to the high global warming potential (GWP). It has 310 times higher than that of CO2. It is reported that Co3O4 is active for direct N2O decomposition owing to its relatively high redox property. Cobalt spinel, however, which was prepared by precipitation was significantly inhibited by O2, H2O at low temperature (＜400℃). To overcome this phenomenon, researchers added alkali and alkaline earth metals on cobalt spinel. Among alkali metals, this study shows that the effect of potassium on cobalt spinel at low temperature (＜400℃) in the presence of O2, H2O. A potassium-doped cobalt spinel catalyst in this experiment was prepared by incipient wetness impregnation of Co3O4, synthesized by precipitation. It showed higher activities than cobalt spinel without potassium. In order to clarify the effect of potassium on cobalt spinel, the prepared catalyst was characterized by BET, O2-TPD, H2-TPR, XRD and XPS. This results indicated doped potassium on cobalt spinel could lead to an increase of catalytic activities. |
