| 초록 |
Although Solid oxide electrolysis cell (SOEC) is an efficient system for CO2 electrolysis, conventional cathode material, Ni/YSZ, has suffered from degradation problem caused by particle agglomeration, carbon deposition, etc. In this study, in situ exsolution with phase transition was used to prepare active metal nanoparticles socketed on the oxide surface and Ruddlesden-Popper support at relatively low annealing temperature. The cathode catalyst, Fe-R.P.LSMF, was prepared by in situ annealing of LSMF in flowing H2 at operation condition. The SOEC button cell with the configuration of LSMF-GDC|LSGM|LSCF-GDC was used for CO2 electrolysis with pre-reduction in H2 for cathode side before the CO2 electrolysis test. The cell shows high current density value at 1.5 V and 850 ℃ with a almost 100% Faraday efficiency. In addition, the cathode material showed stable long-term performance over the 100 h continuous operation. Therefore, the Fe-R.P.LSMF highly promising candidate with high performance and stability for CO2 electrolysis cathode in SOEC. |
