Oxygen reduction reaction operating conditions

From the beginning of SOFC development, it was found that LaSrMnOs (LSM) electrodes had a high activity for oxygen reduction at high temperatures and were stable under SOFC operation conditions. These LSM cathodes have been improved over time and it has been seen that an yttria stabilization of the cathodes improves the performance [35]. Single-phase LSM cathodes show a low oxide diffusion coefficient, so it is better to use a two-phase cathode that results in a lower overpotential for the oxygen reduction reaction. 

The oxygen reduction reaction is a multi-step process, usually comprising several parallel reaction pathways. A thorough understanding of the elementary processes in SOFC cathodes under realistic operating conditions has eluded researchers because of such multiplicity of pathways. Thus, despite numerous... 

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