In this paper the performance in alkaline medium of different catalysts based on perovskite structures are examined, in order to employ them in rechargeable zinc-air batteries. The combinations of compounds in the perovskite structure examined are Sm_0.5Sr_0.5CoO_(3-δ), Sm_0.5Sr_0.5Co_0.8Fe_0.2O_(3-δ), Ce_0.05Sr_0.95CoO_(3-δ) and La_0.6Sr_0.4Co_0.8Fe_0.2O_(3-δ). These combinations have not been well studied for this application, so in this study, it is found that these structures could be highly promising as bifunctional catalysts, because according to the electrochemical tests it is found that the compounds have a significant catalytic activity in both charge and discharge processes. The catalytic powders are synthesized by nitrate co-precipitation technique and they are characterized physically, chemically and electrochemically.