Synthesis, characterization and electrochemical investigation of catalyst ink based on Pd nanoparticles supported on different allotropic carbon as oxygen reduction reaction catalysts

The present research work Palladium-based electrocatalysts on substrates Vulcan, graphene and MWCNTs were successfully synthesized by using NaBH4 reduction, and their electrocatalytic activity was evaluated in alkaline media. morphology and surface analysis studies with SEM, TEM, EDX, XPS methods. The SEM analysis show rod-like morphology with a dia meterin the nano meter range and length varying in some micro-meter. The TEM images showed the in-crease of nano tube diameter after catalyst deposition. The EDX analysis reveals the presence of (Pd: Vulcane, Graphene and MWCNTs) (20:80) wt%. Synthesized electrocatalysts studies with electrochemical methods such as CV, EIS, RDE and CA. The CV results confirmed that the Pd/G electrocatalysts caused by an E onset shift to more positive positions, indicating that the good performance of Pd/Graphene electrocatalyst also have the lowest mass transfer resistance and improved the Overvoltage than platinum-carbon as much as 70 mV at 0.1M sodium hydroxide electrolyte.