| 内容提要: |
The long-term stability and activity of catalysts are vital for vapor-phase selective hydrogenation of dimethyl oxalate to ethanol from both industrial and academic viewpoints. However, poor lifespan and thermal stability is major drawbacks for silica supported copper catalysts because they are significantly deactivated by sintering. We prepared a series of silica-supported copper catalysts doped with boron by an ammonia evaporation hydrothermal method and subsequent impregnation with boric acid, and investigated their catalytic activity and thermostability for hydrogenation of dimethyl oxalate to Ethanol. The characterization of catalyst show that boric oxide doping onto silica supported copper catalysts could facilitate the dispersion of copper species and significantly enhance the metal-support interaction, which was found to be efficient for improving catalytic stability. |