High temperature steam electrolysis (HTSE) is a highly efficient process for the production of pure hydrogen using a combination of electrical and thermal energy and is environmentally clean provided that the electricity used comes from a renewable source (e.g. solar, wind, wave, tidal). HTSE is carried out using a solid oxide electrolysis cell (SOEC), which is essentially a solid oxide fuel cell (SOFC) operated in reverse. That is, steam is electrochemically reduced to hydrogen gas and oxide ions at the hydrogen electrode (cathode), followed by oxide ion migration across the solid electrolyte to the air electrode (anode) where oxygen is evolved. This study considers (La,Sr)TiO3 perovskites as alternative electrolysis cell cathode materials to Ni/YSZ due to their chemical, dimensional, redox, thermal and mechanical stability. The influence of defect chemistry on steam electrolysis properties in particular is investigated

High temperature steam electrolysis at novel strontium titanates cathodes

245th National Meeting (2013)

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