Electrocatalytic Oxidation of Ethanol and Ethylene Glycol onto Poly (o-Anisidine)-Nickel Composite Electrode

Authors

  • Alihossien Imani Young Researchers Club, Quchan Branch, Islamic Azad University, Quchan, I.R. IRAN
  • Ezzat Naddaf Department of Applied Chemistry, Quchan Branch, Islamic Azad University, Quchan, I.R. IRAN
  • Mohammad Reza Abedi Department of Applied Chemistry, Quchan Branch, Islamic Azad University, Quchan, I.R. IRAN
  • Mohammad Saleh Zabihi Department of Applied Chemistry, North Tehran Branch, Islamic Azad University, Tehran, I.R. IRAN
Abstract:

In this work, poly (o-Anisidine) (POA) was prepared by consecutive potential cycling in an acidic monomer solution at the surface of Carbon Paste Electrode (CPE). Nickel ions were dispersed into the polymer by immersing the electrode in NiSO4 solution. The prepared Ni/POA/CPE was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Atomic Force Microscopy (AFM) and electrochemical methods. The electrochemical oxidation of ethanol and ethylene glycol was investigated at the Ni/POA/CPE by cyclic voltammetry and chronoamperometry techniques. The results indicated that the Ni/POA/CPE in comparison with Ni/CPE exhibited excellent electrocatalytic activity towards oxidation. Then, using a chronoamperometry method, the catalytic rate constant, k, for ethanol and ethylene glycol oxidation were found to be 2.6×106 and 1.07×107 cm3/mol s, respectively. Furthermore, the effect of several parameters such as OA concentration, POA thickness, and NiSO4 concentration and accumulation times towards the ethanol oxidation as well as the long-term stability of the modified electrode has been investigated.

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Journal title

volume 36  issue 1

pages  59- 70

publication date 2017-03-01

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