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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.125  No.4 (April) (2017)  >  pp.338-342

Journal of the Ceramic Society of Japan
<<Previous article Vol.125  No.4 (April) (2017)   pp.338 - 342 Next article>>

Hydrogen permeation of BaCe0.80Y0.20O3−δ–Gd0.1Ce0.9Ox dual-phase membranes

Yoshiteru ITAGAKI1), Akinori HIRAOKA1), Hiromichi AONO1), Hidenori YAHIRO1)
1) Graduate Schools of Science and Engineering, Ehime University

Hydrogen permeation properties of Gd0.1Ce0.9Ox/BaCe0.80Y0.20O3−δ (GDC/BCY) dual-phase membranes were evaluated. Nongalvanic hydrogen permeation was observed for 46 vol % GDC-containing BCY membranes: the permeation rate was 0.30 ml·min−1·cm−2 at 800°C. This is almost comparable to the reported value of Ni–BCY cermet (0.50 ml·min−1·cm−2). This nongalvanic hydrogen permeation unambiguously indicates that the BCY–GDC composite functions as a mixed proton–electron conductor in an H2 reducing atmosphere. From a conductivity analysis, it was deduced that 46 vol % GDC/BCY possesses proton and electron conductivities comparable to the bulk states of BCY and GDC. The composite membrane was stable in an atmosphere switching between H2 and air. TGA analysis indicated that addition of GDC enhanced the stability of the BCY phase in CO2.


Keyword:
Hydrogen permeation, BCY, GDC, Mixed proton-electron conductor, Ambipolar conductivity

Received: October 17, 2016
Accepted: February 05, 2017 , Published online: April 03, 2017

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