| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Outline of Final Research Achievements |
Hydration is the key reaction to incorporate protons by filling the oxygen vacancies, Vo, with hydroxyl groups and activate proton conduction in the perovskite. Probing the local environment of oxygen vacancies that are responsible for hydration is, however, challenging because hydration depends on temperature and water partial pressure, which necessitates in situ observation and calculations of the local environment at high temperatures. It is found that the oxygen vacancies preferably exist in the vicinity of Sc dopant as the Sc-VO-Sc and Sc-VO-Zr environments and the former contributes most to hydration in the perovskite. The Zr-Vo-Zr environment is the least abundant among local oxygen vacancy environments in the whole temperature range examined, thus having negligible impact on hydration.
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