Electrocatalytic oxidation of hydrogen peroxide on the surface of nano zeolite modified carbon paste electrode

This study investigated the use of synthesized nanozeolite Y to prepare modified carbon paste electrode for electrocatalytic oxidation of hydrogen peroxide. In order to prepare the modified electrodes, the nickel ions were doped to Y zeolite framework through ion exchange mechanism and the electrochemical behaviour of the proposed modified electrode was studied using the cyclic voltammetry technique. The obtained results revealed that modified carbon paste electrode in the form of Ni/NiYCPE is the best electrode for the oxidation of hydrogen peroxide in the alkaline media. The hydrogen peroxide transfer coefficient (alpha) and the current density were calculated as 0.54 and 6.7 mA/cm(2), respectively. The catalytic rate constant (K) for this electrocatalytic reaction was calculated through the chronoamperometric technique (K = 0.43 x 10(4) cm(2)s(-1)mol(-1)). (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.