In this work, perovskites based on La1-xMnO3+delta and La1-ySryMnO3+delta systems were synthesized by the combustion method, where the rhomboedric phase is reached at 600 degrees C. These synthesized perovskites present sponge type morphology with specific surface areas higher than 10 m(2)/g, and nanometric crystal sizes (15-41 nm). The combustion synthesis allows using a lower temperature of calcination maintaining the nanometric features of the powders while well-crystalized phases are achieved. The conductivity was measured on the powders hand compacted, in order to obtain information of its behaviour comparative to the texture of the PEMFC electrode. Finally, cyclic voltammetry was used to study the stability of the perovskites and their catalytic activity towards the ORR, the results indicate that from all the compositions prepared La0.7Sr0.3MnO3 and La0.98MnO3 show the most interesting results, with the appearance of a cathodic current that indicates the activity of these catalysts towards the ORR at operation temperature of HTPEMFC. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.