Artículos de revistas
Electrochemical preparation and characterization of polypyrrole/stainless steel electrodes decorated with gold nanoparticles
Fecha
2015-01Registro en:
Gutiérrez Pineda, Eduart Andrés; Alcaide, Francisco ; Rodriguez Presa, Maria Jose; Bolzán, Agustín Eduardo; Gervasi, Claudio; Electrochemical preparation and characterization of polypyrrole/stainless steel electrodes decorated with gold nanoparticles; American Chemical Society; Acs Applied Materials & Interfaces; 7; 4; 1-2015; 2677–2687
1944-8244
Autor
Gutiérrez Pineda, Eduart Andrés
Alcaide, Francisco
Rodriguez Presa, Maria Jose
Bolzán, Agustín Eduardo
Gervasi, Claudio
Resumen
The electrosynthesis and characterization of polypyrrole(PPy)/stainless steel electrodes decorated with gold nanoparticles and the performance of the composite electrode for sensing applications is described. PPy films were grown in potassium perchlorate and sodium salicylate solutions under comparable electropolymerization conditions. Polymer films prepared in the presence of perchlorate ions exhibited wormlike structures, whereas columnar structures were obtained in salicylate-containing solutions. Voltammetric response of PPy films prepared in salicylate solutions was more reversible. PPy films were decorated with gold nanoparticles obtained by a double step potentiostatic electrodeposition routine that allowed fine control of deposit characteristics. Analysis of deposits was performed by means of SEM and confocal Raman spectroscopy. The electrocatalytic activity of the Au/PPy electrodes was assessed for the electro-oxidation of hydrazine and hydroxylamine. Results showed a successful optimization of the route of synthesis that rendered nanocomposite electrode materials with promising applications in electrochemical sensing.