Ascorbic Acid Oxidation at Nonmodified and Copper-Modified Polyaniline and Poly-ortho-methoxyaniline Coated Electrodes

The electrochemical oxidation of ascorbate ions is comparatively studied at polyaniline (PANI) and poly-ortho-methoxyaniline (POMA) layers in absence and presence of electrodeposited copper species. In comparison to PANI, POMA layers allow decreasing the overpotential necessary for driving the ascorbate oxidation reaction. A nonlinear dependence of the ascorbate oxidation current on the polymer layer redox charge is found. Copper electrodeposited in PANI and POMA layers is electrocatalytically active for the investigated reaction. Two separate oxidation waves are observed in the case of Cu-PANI whereas a single ascorbate oxidation wave and enhanced currents are found in the Cu-POMA case.

[1]  L. Komsiyska,et al.  Electrochemical formation and copper modification of poly-o-methoxyaniline , 2005 .

[2]  C. Banks,et al.  Direct Oxidation of Ascorbic Acid at an Edge Plane Pyrolytic Graphite Electrode: A Comparison of the Electroanalytical Response with Other Carbon Electrodes , 2005 .

[3]  Lei Zhang,et al.  The electrocatalytic oxidation of ascorbic acid on polyaniline film synthesized in the presence of camphorsulfonic acid , 2004 .

[4]  J. Raoof,et al.  Preparation of polypyrrole/ferrocyanide films modified carbon paste electrode and its application on the electrocatalytic determination of ascorbic acid , 2004 .

[5]  T. Paixão,et al.  Development of a Dual-Band Amperometric Detector for Determination of Ascorbic Acid and Glucose , 2003 .

[6]  J. Kan,et al.  The electrocatalytic oxidation of ascorbic acid on polyaniline film synthesized in the presence of ferrocenesulfonic acid , 2002 .

[7]  Rajendra Prasad Kalakodimi,et al.  Electrooxidation of ascorbic acid on a polyaniline-deposited nickel electrode: surface modification of a non-platinum metal for an electrooxidative analysis. , 2002, Analytical chemistry.

[8]  S. Ivanov,et al.  Influence of copper anion complexes on the incorporation of metal particles in polyaniline Part I: Copper citrate complex , 2002 .

[9]  J. Schultze,et al.  Electrochemical incorporation of copper in polyaniline layers , 2001 .

[10]  S. Ivanov,et al.  Role of polymer synthesis conditions for the copper electrodeposition in polyaniline , 2001 .

[11]  M. Gatta,et al.  Determination of electroactive organic acids by anion-exchange chromatography using a copper modified electrode. , 2001, Journal of chromatography. A.

[12]  P. Bartlett,et al.  The oxidation of ascorbate at poly(aniline)–poly(vinylsulfonate)composite coated electrodes , 2001 .

[13]  A. Turner,et al.  An assay for ascorbic acid based on polyaniline-coated microplates. , 2000, Analytical chemistry.

[14]  R. Ojani,et al.  Electrochemistry and electrocatalytic activity of polypyrrole/ferrocyanide films on a glassy carbon electrode , 2000 .

[15]  A. Galal.  Electrocatalytic oxidation of some biologically important compounds at conducting polymer electrodes modified by metal complexes , 1998 .

[16]  M. Guascito,et al.  Electrocatalysis of ascorbic acid on the glassy carbon electrode chemically modified with polyaniline films , 1997 .

[17]  Hongyuan Chen,et al.  Ascorbate sensor based on ‘self-doped’ polyaniline , 1997 .

[18]  T. Cataldi,et al.  Copper dispersed into polyaniline films as an amperometric sensor in alkaline solutions of amino acids and polyhydric compounds , 1996 .

[19]  A. Milchev,et al.  Growth of polyaniline films under pulse potentiostatic conditions , 1993 .

[20]  J. Schultze,et al.  Nucleation, growth and branching of polyaniline from microelectrode experiments , 1992 .

[21]  A. Milchev,et al.  Electrochemical formation and stability of polyaniline films , 1991 .

[22]  J. Cassidy,et al.  Ascorbic acid oxidation at polypyrrole-coated electrodes , 1991 .

[23]  A. Galal,et al.  Electrochemistry and detection of some organic and biological molecules at conducting poly(3-methylthiophene) electrodes. , 1991, Biosensors & bioelectronics.

[24]  P. Pickup,et al.  Electronically conductive anion exchange polymers based on polypyrrole: Preparation, characterization, electrostatic binding of ferrocyanide and electrocatalysis of ascorbic acid oxidation , 1989 .

[25]  B. Pfeiffer,et al.  Proton migration and water diffusion in polyaniline , 1989 .