The effects of Mo doping into the B-site of La0.3Sr0.7TiO3-delta perovskite on its ionic conductivity and catalytic activity as an anode material of solid oxide fuel cells have been investigated. The partial substitution of Ti by Mo reduces the bond energy between metal and oxygen ions in the perovskite. The concentration of Mo5+/Mo5(6+) redox couples increases with the rise of the content of Mo, while the oxygen ionic conductivity decreases simultaneously. The doping of Mo significantly reduces the anodic polarization resistance and improves the performance of the single cell. The cell with La0.3Sr0.7Ti0.97Mo0.03O3-delta anode and La0.3Sr0.7Ti0.97Mo0.03O3-delta electrolyte exhibits a maximum power density of 135 mW cm(-2) at 850 degrees C with hydrogen as fuel. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.