| 초록 |
Ammonia is attracting attention as a next-generation energy carrier in the hydrogen society. In the current ammonia production, high temperature and high pressure are needed. The development of a highly active ammonia synthesis catalyst will increase the energy efficiency of ammonia synthesis by lowering the operating temperature and pressure. In this study, Ru doped BaCeY-oxide with perovskite structure (ABO3) was synthesized by glycine-nitrate process. Exsolution under reducing condition at high temperature enabled the synthesis of active Ru nanoparticles with uniform distribution and homogeneous particle size on the BaCeY-oxide support. Ammonia synthesis rate of exsolved Ru-BCY catalyst was increased when compared with the Ru-BCY synthesized by the impregnation method, commonly employed catalyst synthesis method, and the commercial Ru/C catalyst. XRD, SEM, TEM, EXAFS, XPS characterizations revealed that the exsolved Ru nanoparticles have strong metal-support interaction between Ru-BCY. Electron-rich Ru nanoparticles are responsible for the high activity of exsolved Ru-BCY catalysts for ammonia synthesis reaction. |
