Activation energy 1 Area-specific resistances 1 Barium compounds 1 Cathodes 1 Cerium compounds 1 Electrocatalytic activity 1 Electrochemical impedance spectroscopy 1 Electrochemical performance 1 Electrode material 1 Energy conservation 1 Environmental technology 1 High temperature operations 1 Intermediate temperatures 1 Lanthanum compounds 1 Proton conducting Proton-conducting electrolyte 1 Proton-conducting solid oxide fuel cells 1 Screen printing 1 Sol-gel process 1 Sol-gels 1 Solid electrolytes 1 Solid oxide fuel cells (SOFC) 1 Strontium compounds 1 Zirconium compounds 1