Electrode potentials of electrochemical cells with oxide-conducting solid electrolyte in chemically nonequilibrium gas mixtures

A wide range of electrodes for solid oxide electrolyte cells in chemically nonequilibrium gas media simultaneously containing oxygen and combustible gases is systematically studied. The concentration dependences are investigated for the potential response of electrodes made of conducting oxides, noble metals (platinum, gold, silver), and also composite electrodes containing dispersed oxide semiconductor phases, apart from the main conducting material. Besides, dynamic characteristics of these electrodes are investigated. The studies are performed in the temperature range from 450 to 800°C. The content of combustible gases in the mixture was varied from 10 ppm to 2%. The research results are of interest for development of sensors for combustible gases and for studying kinetics and mechanisms of catalytic oxidation reactions.