Producción Científica Profesorado

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

Mendoza Huizar, Luis Humberto


Kinetics of polypyrrole films doped with sulphate ions electrodeposited over graphite epoxy resin electrode. T. de J. Licona-Sánchez a, G. A. Álvarez-Romero a, L. H. Mendoza-Huizar a, M. E. Palomar-Pardavéb, C. A. Galán-Vidal. ECS Transactions (2009) Volume 20, pp- 385-392 ISSN: 1938-5862


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

Underpotential deposition of cobalt onto polycrystalline platinum

Análisis del Comportamiento Presión-Temperatura en la Transición Isotrópico-Nemático del p-Azoxianis...

Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

Kinetic study of the cobalt electrodeposition onto glassy carbon electrode from ammonium sulfate sol...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Zinc Electrodeposition from Chloride Solutions onto Glassy Carbon Electrode

A theoretical quantum study on the distribution of electrophilic and nucleophilic active sites on th...

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micr...

The role of temperature in copper electrocrystallization in ammoniachloride solutions