Meso/macroporous La1 xSrxCoO3 δ, Pr1 xSrxCoO3 δ and Gd1 xSrxCoO3 δ powders with the specific surface area higher than 100 m2 g 1 from the corresponding nitrates have been synthesized using solution decomposition method. These nanopowders have been used for preparation of SOFC cathodes, demonstrating lower oxygen electroreduction activation energy than corresponding less porous cathodes prepared using traditional solid state reaction method. To increase macroporosity of the cathodes the special pore forming agent has been added into the raw cathode paste. The single cells based on the Ce0.9Gd0.1O1.95 electrolyte and Ni-Ce0.9Gd0.1O1.95 cermet anode have been completed and tested using the humidified hydrogen and 10 % (wt) H2 + 90 % Ar mixture. The very low total polarization resistance and activation energy have been obtained. According to IUPAC, the micropores are pores with the diameter d lower than 2 nm, the mesopores are with d from 2 to 20 nm and macropores are with d more than 20 nm.