This research studies the preparation of the Pt-Co alloy catalyst on the electrode by the pulse reverse electrodeposition technology to use for the oxygen reduction reaction (ORR) in the proton exchange membrane fuel cell (PEMFC). The cathodic current density (ic) was varied between 20 and 200 mA.cm⁻² and the anodic current density (iₑ) was varied between 50 and 200 mA.cm⁻² with a fixed total charge density of 2 C.cm-2 and ratio of cathodic charge density to anodic charge density of 2:1. It was found that the cathodic current density significantly affected the catalyst loading, morphology and grain size of deposited Pt-Co/C electrocatalyst. The cathodic current density of 200 mA.cm⁻² gave the lowest catalyst loading (about 0.04 mg.cm⁻²) and highest active surface area (1100 – 2200 m².gPt⁻¹). On the other hand, the anodic current density did not show the substantial effect on the Pt-Co/C catalyst loading, morphology, grain size and composition of the catalyst. The electrocatalytic reaction towards ORR studied by hydrodynamic voltammetry on the rotating disk electrode indicated that Pt-Co/C electrocatalyst had a direct 4 electron pathway for the oxygen reduction reaction. Moreover it was found that Pt-Co/C provided higher electrocatalytic activity (14.71 mA.cm⁻²) than Pt/C (12.35 mA.cm⁻²) which indicate the potential of Pt-Co catalyst to use for the ORR in PEMFC.