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

M. Khalid Hossain, Kenichi Hashizume

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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

Original languageEnglish
Article number164436
JournalJournal of Alloys and Compounds
Volume907
DOIs
Publication statusPublished - Jun 25 2022

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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