| 초록 |
For the direct utilization of greenhouse gases of methane and carbon dioxide, dry reforming of methane (DRM) has advantages for producing syngas, which is used as a building block for production of valuable chemicals. Ni-based catalysts are known to be appropriate due to their low cost and high activity, however, significant coke and sintering of Ni nanoparticles to form less active larger agglomerates lead to the deactivation at a high temperature of the reaction. In order to prevent these problems, single Ni nanoparticle was encapsulated with Ce-SiO2 shell, which suppressed coke formations and aggregations of Ni NPs by the spatial confinement effects. In this study, cerium promoter was used to enhance the activity and sustain the structure under a high temperature DRM reaction. |
