The migration of dissolved H ions, as induced by an applied potential, was studied at temperatures ranging from 25 to 200C. It was found that the H ions migrated towards the cathode, and were trapped there when the cathode material had the ability to getter H. The amounts of H which were retained in the cathode could be determined by using the ERDA technique, and a high-energy 4He beam. In order to estimate the proton transport number, defined as being the ratio of the proton conductivity to the total electrical conductivity, the amount of H which was retained in the cathode was measured as a function of the electric charge number through the specimen.

Migration of Hydrogen Ions in SrCeO3 Studied by ERD Analysis. T.Arai, A.Kunimatsu, K.Takahiro, S.Nagata, S.Yamaguchi, Y.Akiyama, N.Sata, M.Ishigame: Solid State Ionics, 1999, 121[1-4], 263-70