ELECTROCHEMIAL REACTION KINETICS OF MIXED CONDUCTING ELECTRODES ON CeO_2-BASED SOLD) ELECTROLYTES

摘要

Porous and dense La_(0.6)Sr_(0.4)CoO_(3-δ) layers were prepared as working electrodes on 10 mole %CaO doped CeO_2 electrolytes. Electrochemical measurements were made as a function of oxygen partial pressure at 500 to 900℃. The electrode interface conductivity and the steady-state polarization curve suggested that the reaction rates with porous electrodes are controlled by gas diffusion process at low P(O_2) and those with dense electrodes by surface reaction.