Investigation of the oxygen reduction reaction on palladium nanoparticles decorated chlorine doped RGO in alkaline media

The oxygen reduction reaction (ORR) on Pd nanoparticles decorated chlorine doped reduced graphene oxide (Pd/Cl-RGO) electrocatalyst have been investigated in alkaline media. Pd is a promising alternative to the expensive platinum. The surface morphology of prepared materials (RGO, Cl-RGO and Pd/Cl-RGO) is studied by transmission electron microscopy (TEM). The characterization of synthesis catalysts was performed by FT-IR, XRD and Raman techniques. The electrocatalyst performances are investigated by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy in 0.1 M KOH solution. The Pd/Cl- RGO exhibited excellent eletrocatalytic activity towards the ORR in alkaline media. The ORR proceeds via 4-electron pathway using rotating disk electrode (RDE) technique.