A comparative study on the hydrogen dissolution and release behaviors in the zirconate proton conductors by TDS and TMAP4 analysis

Proton-conducting oxides are potential materials for electrochemical devices such as fuel cells, hydrogen pumps, sensors, and the tritium purification recovery system in nuclear fusion reactors. The concentration oxide is important, but its precise measurement difficult. In this study, thermal desorption spectroscopy (TDS) was used to investigate dissolution release behavior three zirconates, BaZr0.9Y0.1O3-? (BZY), BaZr0.955Y0.03Co0.015O3-? (BZYC), CaZr0.9In0.1O2.95 (CZI) temperature range of 673–1273 K using deuterium (D2) (1.33 kPa) heavy water (D2O) (2.8 kPa, saturated pressure at room temperature). To compare experimental results D2 D2O profiles derived by TDS analysis, simulation code migration analysis program, version 4 (TMAP4) employed. From measurement, a similar trend temperature-dependent solubility obtained all samples compared literature data HT- DTO-exposed imaging plate (TIP) method. A higher amount dissolved both BZY BZYC under exposure 873 K, highest found BZYC. most cases, diffusivities calculated TMAP4 were than values, because oxygen not considered diffusion species TMAP4.