Journal of the Chilean Chemical Society
versión On-line ISSN 0717-9707
DREYSE, PAULINA; RAMIREZ, GALO; RIQUELME, ANDREA y ISAACS, MAURICIO. SPECTROELECTROCHEMICAL STUDIES ON ITO MODIFIED ELECTRODES WITH A CONDUCTING COBALT (II) MACROCYCLE FILM IN THE ELECTROCHEMICAL REDUCTION OF CO2. J. Chil. Chem. Soc. [online]. 2006, vol.51, n.2, pp. 923-926. ISSN 0717-9707. doi: 10.4067/S0717-97072006000200017.
The spectroelectrochemical properties of a conducting polymer derived from Co(II) tetra-3-amino-phenyl-porphyrin,(poly-Co(II)-TAPP) were studied towards the electrochemical reduction of CO2 on ITO surface. Under inert atmosphere, the results show that the polymer present a stable Co(I) oxidation state only in basic pH while in more acidic solution this Co(I) does not stabilize. Under CO2 atmosphere the reduced polymer forms a stable adduct with no clear electronic localization. The formation and the stability of this adduct could explain the wide distribution of reaction products
Palabras clave : electrochemical reduction of carbon dioxide; porphyrins; conducting polymers.