Abstract

Optimum conditions to electrodeposit poly(thiophene), poly(pyrrole) or poly(aniline) and to modify these electrodes by electrodeposition of Pt or Pt+Pb particles on these matrices have been established. The response of these electrodes was assayed for the oxidation of small molecules, showing that metal micro-particles in polymers are a promising route to obtain electrodic systems presenting very interesting electrocatalytic activity. In addition, a study has been undertaken to optimize the electro-obtention of poly(o-phenylene diamine) because of the wide electrochemical window it shows in different electrolytes. Once the optimum conditions had been determined for the electrochemical deposit formation, the methodology to disperse Cu on the polymeric matrix was established. For this purpose, a procedure analogous to that employed to disperse Pb was followed. The response of this modified electrode was assayed as an amino-acid sensor.