A low cost and highly active non-noble alloy electrocatalyst for hydrazine oxidation based on nickel ternary alloy at the surface of graphite electrode

• Preparation of a low cost and highly active alloy electrocatalysts based on nickel ternary alloy at the surface of graphite electrode.
• Study the electro-oxidation of hydrazine by electrochemical methods.
• Comparing electrochemical oxidation of hydrazine on pure metals and ternary alloy
• Investigating the electrocatalytic mechanism of the modified electrode

The electrocatalytic oxidation of hydrazine was studied over Ni, Cu, Co and Ni-based ternary alloy on graphite electrodes in alkaline solution. The catalysts were prepared by cycling the graphite electrode in solutions containing Ni, Cu and Co ions at cathodic potentials. The synergistic effects and the catalytic activity of the modified electrodes were investigated by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). It was found that, in the presence of hydrazine, the modified Ni-based ternary alloy electrode (G/NiCuCo) exhibited a good catalytic activity for the oxidation of hydrazine at a reduced overpotential and it has a significant high response for hydrazine oxidation. During CA regime the reaction follows a Cottrellin behavior and the diffusion coefficient of hydrazine is found to be 6.28 × 10− 6 cm2 s− 1. EIS studies were used to investigate the catalytic oxidation of hydrazine on the surface of the modified electrode.

Stable electroactive modified electrodes with Ni based ternary alloy at graphite rod (G/NiCuCo) were prepared by cyclic voltammetry. It was found that the G/NiCuCo exhibited good catalytic activity for the oxidation of hydrazine at a reduced overpotential and it has a significant high response for hydrazine oxidation.Figure optionsDownload as PowerPoint slide