Producción Científica Profesorado

Kinetics of Polypyrrole Films Doped with Sulphate Ions Electrodeposited Over Graphite - Epoxy Resin Electrode



Alvarez Romero, Giaan Arturo

2009

Licona-Sánchez T. J., Álvarez-Romero G. A., Mendoza-Huizar L. H., Palomar-Pardavé M. E., Galán-Vidal C. A., 24th Meeting of The Mexican Electrochemical Society and 2nd Meeting of the Mexican Section of the Electrochemical SocietyVolume 20, Issue 1 - May 31 - June 5, 2009 , Puerto Vallarta, MexicoMES 24: Electrochemical Applications to Biology, Nanotechnology, and Environmental Engineering and Materials. ISSN 1938-5862


Abstract


A kinetic study for the electrosynthesis of polypyrrole (Ppy) doped with SO4-2 ions is presented. Ppy films are electrochemically polymerized over graphite - epoxy resin electrode. Cyclic voltammetry shows a non-reversible process and the charge density increases as the number of cycles increases too. Current transients are obtained for three different potentiometric behaviors: anionic, cationic and a combination of both. Experimental data was statistically fitted to theoretical models to determine the nucleation and growth processes governing the polymer synthesis. Statistical fit suggests that the mechanism involved in the electropolimerization process is 3D nucleation limited by diffusion of the electroactive specie. The anionic-response polymer displays the lowest diffusion coefficient, while the cationic-response polymer displays the highest one. In all cases, both the active-sites number and the nucleation rate have considerably high values.



Producto de Investigación




Artículos relacionados

Determination of primary amino acids in wines by high performance liquid magneto-chromatography

Construction and Evaluation of a Gold Tubular Electrode for Flow Analysis: Application to Speciation...

Simultaneous determination of tetracyclines in poultry muscle by capillary zone electrophoresis

Design and Construction of Solid State Ag/AgCl Reference Electrodes Through Electrochemical Depositi...

Synthesis and crystal structures of cis-palladium(II) and cis-platinum(II) complexes containing dipy...

Potentiometric quantification of saccharin by using a selective membrane formed by pyrrole electropo...

Prevalence and Antimicrobial Resistance Patterns of Salmonella from Different Raw Foods in Mexico

cis-Palladium(II) complexes of derivatives of di-(2-pyridyl)methane: Study of the influence of the b...

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Dope...

Development of a novel composite sensor based on doped pyrrole selective to nitrate ions