Electrochemical reduction of SO2 on poly-Co-3-tetraaminophenylporphyrin glassy carbon modified electrode

Fuenzalida F.; Dreyse, P; Villagra D.; Matsuhiro, B.; Mendoza L.; Aguirre, M; Isaacs, M.

Abstract

This article describes the electrochemical reduction of sulfite in water-ethanol mixtures under acidic conditions on a glassy carbon electrode modified with a conducting film formed by Co(II) tetra-3-aminophenyl porphyrin. Rotating disc electrode experiments show a kinetic limitation related with the formation of an adduct between the reduced porphyrin and the sulfur compound. UV-Visible spectroelectrochemical data suggest that Co(I) is not stabilized; thus the adduct should involve a radical species of the porphyrin. However, the resulting modified electrode is stable and shows a linear relationship between current and concentration of the sulfur species at pH 1. The detection range of sulfite by the modified electrode goes from 12 to 150 mg L-1. The detection limit is 4.15 mg L-1. © 2009 Taylor & Francis.

Más información

Título según WOS: Electrochemical reduction of SO2 on poly-Co-3-tetraaminophenylporphyrin glassy carbon modified electrode
Título según SCOPUS: Electrochemical reduction of SO2 on poly-Co-3- tetraaminophenylporphyrin glassy carbon modified electrode
Título de la Revista: JOURNAL OF COORDINATION CHEMISTRY
Volumen: 62
Número: 1
Editorial: TAYLOR & FRANCIS LTD
Fecha de publicación: 2009
Página de inicio: 130
Página final: 140
Idioma: English
URL: http://www.tandfonline.com/doi/abs/10.1080/00958970802474839
DOI:

10.1080/00958970802474839

Notas: ISI, SCOPUS