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

作者：Itagaki Yoshiteru^*; Hiraoka Akinori; Aono Hiromichi; Yahiro Hidenori

来源：Journal of the Ceramic Society of Japan, 2017, 125(4): 338-342.

DOI：10.2109/jcersj2.16230

• Hydrogen permeation
• BCY
• GDC
• Mixed proton-electron conductor
• Ambipolar conductivity

Hydrogen permeation properties of Gd0.1Ce0.9Ox/BaCe0.80Y0.20O3-delta (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 degrees 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 H-2 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 H-2 and air. TGA analysis indicated that addition of GDC enhanced the stability of the BCY phase in CO2.

• 出版日期2017-4