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

Jafarian, M ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jelechem.2015.12.031
  3. Publisher: Elsevier B.V , 2016
  4. Abstract:
  5. 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
  6. Keywords:
  7. Hydrazine ; Modified electrode ; Catalyst activity ; Chronoamperometry ; Cyclic voltammetry ; Electrocatalysis ; Electrochemical electrodes ; Electrochemical impedance spectroscopy ; Electrodes ; Graphite ; Graphite electrodes ; Nickel ; Oxidation ; Ternary alloys ; Alkaline solutions ; Alloy electrodes ; Cathodic potentials ; Electro-catalytic oxidation ; High response ; Hydrazine oxidation ; Modified electrodes ; Synergistic effect ; Catalytic oxidation
  8. Source: Journal of Electroanalytical Chemistry ; Volume 763 , 2016 , Pages 134-140 ; 15726657 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1572665715302538?via%3Dihub