electrodeposition of ptni nanoparticles on a polymer substrate to investigate the electrocatalytic reduction of oxygen in the alkaline media

Abstract: polymeric backing materials for catalysts in oxygen reduction reaction (orr) are very important. in this work, the glassy carbon electrode was coated with a film of polymeric eriochrome black b after modification with carbon nanotubes [1]. metallic nanoparticles including nickel and platinum were electrodeposited on the polymeric substrate by applying a constant potential through the chronoamperometry and pulses methods. next, the electrocatalytic reductions of oxygen in alkaline medium on the surface of the modified electrodes were investigated [2]. electrochemical studies including cyclic voltammetry and linear scanning voltammetry showed that the pulse method dramatically improves the performance of pt nanoparticles for the oxygen reduction reaction. this improvement was confirmed by examining the onset potential and current density during oxygen reduction [3]. in order to investigate the charge transfer resistance at the modified electrode surface, the electrochemical impedance spectroscopy study was performed to compare the behavior of the catalysts in terms of charge transfer resistance.