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

作者：Lim Dae Kwang; Im Ha Ni; Song Sun Ju^*; Yoo Han Ill

来源：Scientific Reports, 2017, 7(1): 486.

DOI：10.1038/s41598-017-00595-w

Mass relaxation profile of a perovskite-type oxide, BaCe0.9Y0.1O3-(delta), 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(pH(2)O/ atm) <= -1.6) at a constant oxygen partial pressure (log(pO(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 8R(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.

• 出版日期2017-3-28