Transport numbers from hydrogen concentration cells over different oxides under oxidising and reducing conditions†
Abstract
Partial hydrogen ion conductivity in acceptor doped CaTiO3, BaCeO3 and ZrO2 and nominally undoped BaTiO3 and TiO2 has been investigated by transport number measurements using the hydrogen concentration cell/EMF method in wet atmospheres as a function of pO2
(10−20–1 atm) at 800 or 1000 °C. All