In:
Materials Science Forum, Trans Tech Publications, Ltd., Vol. 514-516 ( 2006-5), p. 1391-1395
Abstract:
Dense ceramic anodes of perovskite-type La1-x-ySrxCo1-zAlzO3-δ ( x = 0.45-0.70; y = 0-
0.05; z = 0-0.20) and K2NiF4-type La2Ni1-xMexO4+δ (Me = Co, Cu; x = 0-0.20), synthesized by the glycine-nitrate technique, were assessed for oxygen evolution in alkaline media. The lowest
overpotentials are observed for (La0.3Sr0.7)0.97CoO3-δ, which exhibits a significant oxygen deficiency in combination with high conductivity associated with the A-site cation nonstoichiometry
compensation mechanism via Co4+ formation. Perovskite-type cobaltite anodes are essentially stable in alkaline solutions, whilst La2NiO4-based electrodes exhibit degradation at the potentials
where the oxygen evolution occurs, probably due to the electrochemical oxygen intercalation in the lattice.
Type of Medium:
Online Resource
ISSN:
1662-9752
DOI:
10.4028/www.scientific.net/MSF.514-516
DOI:
10.4028/www.scientific.net/MSF.514-516.1391
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2006
detail.hit.zdb_id:
2047372-2