Journal
CHEMISTRY OF MATERIALS
Volume 18, Issue 19, Pages 4647-4650Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm0518224
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Successful development of hydrogen separation membranes based on mixed ionic and electronic conductors may improve the economics of hydrogen production. While high proton conductivity has been reported for many perovskite-type oxides in a humid atmosphere, materials with both high proton conductivity and good chemical stability under conditions for practical hydrogen separation are yet to be developed. In this paper, we report the effect of Zr-doping in BZCYs [Ba( Zr0.8-chi Ce chi Y0.2)O3-alpha] (0.4 <= chi <= 0.8) on the proton conductivity and chemical stability. A novel Ni-BZCY7 [Ni-Ba(Zr0.1Ce0.7Y0.2)-O3-alpha cermet (metal-ceramic composite) membrane appears to have not only high proton conductivity but also adequate stability in a CO2- and H2O-containing atmosphere.
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