Electrochemical characterization of the redox couple of Fe(III)/Fe(II) mediated by grafted polymer electrode

A new grafted polymer electrode (GPE) (polystyrene as polymer) was grafted with acrylonitrile as a monomer using gamma irradiation to produce a new grafted polymer. The redox process of K3Fe(CN)6 during cyclic voltammetry was studied by the new GPE. The ratio of Ipc/Ipa >1 of GPE to GCE Ipc/Ipa = 1.7, indicating that this electrode is a reversible electrode and can be used in conductivity studies by voltammetric analysis. The physical properties of the new electrode GP have good hardness, insolubility, and stability at different high temperatures and at different pH. Also, the sensitivity under conditions of cyclic voltammetry is significantly dependent on pH, electrolyte, and scan rate. At different scan rates, two oxidation peaks and two reduction peaks of Fe(III) were observed in a reversible process: Fe(III) Fe(II), and Fe(II) Fe(0). Interestingly, the redox reaction of Fe(III) solution using GPE remained constant even after 15 cycles. It is therefore evident that the GPE possesses some degree of stability. The potential use of the grafted polymer as a useful electrode material is therefore clearly evident.

[1]  W. Tan,et al.  Electrochemical Oxidation of Methionine Mediated by a Fullerene‐C60 Modified Gold Electrode , 2008 .

[2]  W. Tan,et al.  Synthesis and characterization of grafted polystyrene with acrylonitrile using gamma-irradiation , 2010 .

[3]  E. Al-Mulla.  Preparation of polylactic acid/epoxidized palm oil/fatty nitrogen compounds modified clay nanocomposites by melt blending , 2011 .

[4]  S. Bebelis,et al.  Electrochemical Characterization of a La0.8Sr0.2Ni0.4Fe0.6O3-δ Electrode Interfaced with La9.83Si5Al0.75Fe0.25O26{plus minus}δ Apatite-type Electrolyte , 2009 .

[5]  E. Al-Mulla.  Polylactic acid/epoxidized palm oil/fatty nitrogen compounds modified clay nanocomposites: Preparation and characterization , 2011 .

[6]  R. Jerome,et al.  Investigation of the cathodic electropolymerization of acrylonitrile, ethylacrylate and methylmethacrylate by coupled quartz crystal microbalance analysis and cyclic voltammetry , 1999 .

[7]  R. Compton,et al.  Variable-Temperature Microelectrode Voltammetry: Application to Diffusion Coefficients and Electrode Reaction Mechanisms , 1999 .

[8]  C. A. Wilkie,et al.  Thermal degradation of poly(styrene-g-acrylonitrile) , 1997 .

[9]  S. Hosseini,et al.  Chemical and electrochemical synthesis of conducting graft copolymer of acrylonitrile with aniline , 2006 .

[10]  N. Ibrahim,et al.  Fatty amides synthesized from vegetable oil as extractant of molybdenum(VI) , 2013, Research on Chemical Intermediates.

[11]  A. Jendrychowska-Bonamour,et al.  Greffage radiochimique de l'acrylonitrile sur le polystyrene—II. Separation et identification des produits resultants du greffage direct. Etude des proprietes des copolymeres greffes , 1977 .

[12]  Allen J. Bard,et al.  Electrochemical Methods: Fundamentals and Applications , 1980 .

[13]  E. Al-Mulla.  Preparation of new polymer nanocomposites based on poly(lactic acid)/fatty nitrogen compounds modified clay by a solution casting process , 2011 .

[14]  S. Holdcroft,et al.  Conductivity and Electrochemical ORR Mass Transport Properties of Solid Polymer Electrolytes Containing Poly(styrene sulfonic acid) Graft Chains , 2003 .