Performances of Doped Ceria Hydrogen Electrodes with Highly Dispersed Ni-Based Nanoparticles for Solid Oxide Electrolysis Cells

摘要

For the hydrogen electrode in the solid oxide electrolysis cell (SOEC), nanometer-sized Ni catalysts were highly dispersed on samaria-doped ceria (SDC). It was found that the current density on Ni-dispersed SDC at 900 °C and the potential of -1.0 V vs. air increased by 1.5 times with decreasing the Ni particle size from 70 nm to 40 run, even when the Ni-loading was decreased from 17 vol.% to 8 vol.%.