Steam concentration cell using a high temperature type proton conductive solid electrolyte

Abstract

The concept of a steam concentration cell is discussed. A steam concentration cell was constructed using proton conductive solid electrolytes based on SrCeO₃ and the emf was measured under various conditions. Some characteristics of the cell on discharging are discussed. The electrode reactions in the cell were studied and the electroactive species at the anode was confirmed to be water molecules. The theoretical equation for the emf of the steam concentration cell is derived. Since conduction in the specimen oxides was not purely ionic but partially electronic, the proton transport numbers were determined from the emf of the cell under various conditions.