Hydration of Proton-conducting BaCe0.9Y0.1O3−δ by Decoupled Mass Transport

Mass relaxation profile of a perovskite-type oxide, BaCe 0.9 Y 0.1 O 3−δ , was studied to understand decoupled diffusion of oxygen and hydrogen species during hydration/dehydration. The mass relaxation measurements are performed by thermogravimetric analysis (TGA) under various humidity conditions (...

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Bibliographic Details
Published in:Scientific reports 2017-03, Vol.7 (1), p.486-486, Article 486
Main Authors: Lim, Dae-Kwang, Im, Ha-Ni, Song, Sun-Ju, Yoo, Han-Ill
Format: Article
Language:English
Subjects:
639/166/987
639/301/1005/1007
639/4077/893
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Mass relaxation profile of a perovskite-type oxide, BaCe 0.9 Y 0.1 O 3−δ , was studied to understand decoupled diffusion of oxygen and hydrogen species during hydration/dehydration. The mass relaxation measurements are performed by thermogravimetric analysis (TGA) under various humidity conditions (Dry, −3.0 ≤ log( p H 2 O/atm) ≤ −1.6) at a constant oxygen partial pressure (log( p O 2 /atm) = −1.00 ± 0.01). The decoupled ions participated in hydration/dehydration reactions were proven to be at different ratios from the result introduced by the 8 R m function. The enthalpy and entropy of non-stoichiometric hydration reaction, which considers each ratio of charge-carrier species, were −144.7 ± 3.7 kJ/mol and −147.8 ± 3.2 J/mol · K, respectively.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-00595-w