3 years ago

Promoted Hydride/Oxide Exchange in SrTiO3 by Introduction of Anion Vacancy via Aliovalent Cation Substitution

Promoted Hydride/Oxide Exchange in SrTiO3 by Introduction of Anion Vacancy via Aliovalent Cation Substitution
Fumitaka Takeiri, Takafumi Yamamoto, James Hester, Kohei Aidzu, Hiroshi Kageyama, Yoji Kobayashi, Takeshi Yajima, Toshiaki Matsui
Topochemical anion exchange reactions for a ScIII-substituted SrTiIVO3 perovskite, Sr(Ti1−yScy)O3−y/2y/2 (y ≤ 0.1), using CaH2 revealed that the initial introduction of a small amount of anion vacancies (y/2) is crucial to enhance the anion (H/O2−) exchangeability. This observation demonstrates the importance of anion vacancies to improve anion (H/O2−) diffusion, which is a well-known strategy for improving oxide anion conductivity.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01845

DOI: 10.1021/acs.inorgchem.7b01845

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