(La,Sr)(Cr,Mn)O3/GDC cathode for high temperature steam electrolysis and steam-carbon dioxide co-electrolysis

► In this study we examine the LSCM/GDC cathode performance for high temperature steam electrolysis and H2O-CO2 electrolysis. ► We find sigmoidal shaped polarization curves at insufficient steam feed. ► We conclude that inadequate steam supply and restricted diffusion are limiting factors in the feeds we used.