Nonstoichiometric Y-substituted SrTiO3 materials as anodes for solid oxide fuel cells

Nonstoichiometric yittrium-substituted SrTiO3 samples with a nominal composition of SrxY0.07TiO3 +/-delta (x = 0.87-1.01) and Sr0.895Y0.07TixO3-delta (x = 1.00-1.20) were prepared and investigated. Phase impurities were found in samples with too high A-site or B-site deficiency. The electrical properties of the samples sintered in reducting atmosphere at different temperatures were analyzed with a view to their potential use as anode materials for solid oxide fuel cells (SOFCs). The redox properties of selected samples were investigated in detail. Samples with small A-site deficiency were considered to be the best candidates for SOFC anode materials. (C) 2010 Elsevier B.V. All rights reserved.