Electrochemical behaviour of ferrocene in the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate, EMIMBF4, at 298 K

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Barrado, E (Autor) Outra; Couto, RAS (Autor) Outra; M. Beatriz Q. Garcia (Autor) FFUP; Lima, JLFC (Autor) FFUP; Castrillejo, Y (Autor) Outra

Revista

Título: Journal Of Electroanalytical Chemistry

Vol. 720

Páginas: 139-146

ISSN: 1572-6657

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 13 Citações

Outras Informações

ID Authenticus: P-009-CG2

DOI: 10.1016/j.jelechem.2014.03.026

Abstract (EN): Electrochemical oxidation of ferrocene (Fc) at platinum and glassy carbon electrodes in the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate, EMIMBF4, has been studied by cyclic voltammetry (CV), convolutive potential sweep voltammetry (CPSV), chronopotentiometry (CP) and chronoamperometry (CA). On both electrodes, the electro-oxidation of ferrocene to ferrocenium (Fc(+)) takes place in a quasi-reversible electrochemical mode. The intrinsic rate constant of charge transfer, k(0), and the charge transfer coefficient, alpha, have been calculated for the first time in the mentioned ionic liquid, by simulation of the cyclic voltammograms, logarithmic analysis of the convoluted curves and from the steady-state current potential curves by applying the Gauss-Newton non-linear square method. The diffusion coefficient of Fc has been also calculated by CV, CPSV, CP and CA. A two-way analysis of variance, ANOVA, has shown that with a 95% confidence level, there are no significant differences between the diffusion coefficients obtained with both electrodes by the different techniques.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8