Solid oxide fuel cell anodes comprised of vanadium deficient lanthanum strontium vanadate (La0.7Sr0.3V1-xO3-delta for x = 0, 0.05, 0.10, 0.15, and 0.20) infiltrated into porous yttria stabilized zirconia (YSZ) were investigated. La0.7Sr0.3V1-xO3-delta (LSV) remained single phase up to x = 0.10, with the formation of La2O3 and Sr6V6O19 impurities for x = 0.15 and x = 0.20, respectively. The bulk electronic conductivity of LSV decreased with an increase in vanadium deficiency from 79 S . cm(-1) for x = 0 to 32 S . cm(-1) for x = 0.10, and an electronic conductivity greater than 1 S . cm(-1) was achieved for porous LSV-YSZ composites over the range of vanadium deficiencies studied. For fuel cell testing, the addition of Pd or Pt was required to achieve high performance with LSV-YSZ anodes. Significant anode deactivation was observed for Pd-LSV-YSZ and Pt-LSV-YSZ anodes upon redox cycling, i.e. upon exposure to air, for LSV with no vanadium deficiency. This deactivation was substantially mitigated as the vanadium deficiency in LSV was increased. The addition of CeO2 further stabilized anode performance. Both Pd and Pt-containing anodes performed well in hydrogen; however, only Pt-LSV-YSZ anodes showed stable operation in the presence of methane. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.092205jes] All rights reserved.