This paper examines the relative REDOX stability and conductivity of new Cr-doped perovskite materials (Sm0.95Ce0.05Fe1-xCrxO3-delta, x = 0-0.10) for potential use as anode materials and sensors for reducing gases at low temperatures. These perovskite materials were characterized by XRD, XPS and SEM. A reduction stability test revealed that these perovskites are stable at temperatures below 800 degrees C under reducing conditions. The introduction of Cr in the lattice was found to be in the form of Cr+3 and Cr+6. As a function of Cr content, the ratio of Cr+3/Cr+6 was found to increase. The reduction treatment tended to decrease the concentration of lattice oxygen but the surface adsorbed oxygen was found to be higher in reduced samples as compared to fresh samples. This observation suggested that these materials have a tendency to recapture oxygen when exposed to air after the reduction treatment. The reduction treatment improved the electrical conductivity due to the formation of nanoparticles. The x = 0.03 perovskite has highest electrical conductivity under both air and reducing atmospheres and shows the greatest promise for use in sensor applications for reducing gases at low temperatures. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3619794] All rights reserved.