Mechanical Alloying Preparation of La[sub 0.6]Ca[sub 0.4]CoIr[sub 0.25]O[sub 3.5−δ] as a Bifunctional Electrocatalyst in Alkaline Electrolyte

was prepared by a mechanical alloying process from mixtures of and . Scanning electron microscopy images on the resulting powders exhibited particles with irregular shape at 300–500 nm in size. X-ray diffraction analysis confirmed formation of a perovskite with complete disappearance of rutile signals from , indicating successful incorporation of at the sites. Supported on carbon nanocapsules, the demonstrated superior performance over those of in both charging and discharging current density–voltage polarizations. In addition, galvanostatic charging and discharging measurements at 25 and indicated that the electrocatalytic abilities of are stable and sustainable.