Bioelectrochemistry of Cytochrome c in a Closed Bipolar Electrochemical Cell - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Electrochemistry Communications Année : 2019

Bioelectrochemistry of Cytochrome c in a Closed Bipolar Electrochemical Cell

Résumé

The reversible oxidation and reduction of Cytochrome c (Cyt c) is demonstrated with a closed bipolar electrochemical cell (CBPEC). Herein, a 4-electrode configuration was studied with the opposite poles of the bipolar electrode resting in separate aqueous and organic electrolyte solutions, respectively. Using biocompatible indium tin oxide (ITO) slides as the bipolar electrode poles, we investigated the influence of the redox potential of the reductant (decamethyferrocene or dimethylferrocene) in an trifluorotoluene organic phase on the observed voltammetry. Reversible electron transfer was only observed between Cyt c and decamethylferrocene. Use of the weaker dimethylferrocene as the reductant required a larger external bias of the driving electrodes to initiate the electron transfer reaction between the two poles of the bipolar electrode. Consequently, the surface of the ITO slide at the aqueous pole experienced a significant negative cathodic potential and underwent irreversible reduction. The biphasic 2 setup using the 4-electrode CBPEC provides insights into electron transfer processes at an interface between two immiscible electrolyte solutions (ITIES), highlighting the strong probability of observing interfacial electron transfer between decamethylferrocene (but not dimethylferrocene) and Cyt c within the short ~ 1 V polarisable potential window available at an ITIES.
Fichier principal
Vignette du fichier
2019_Gamero_Quijano_Electrochem_Commun-postprint.pdf (842.44 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02353776 , version 1 (02-12-2020)

Identifiants

Citer

Alonso Gamero-Quijano, Gregoire Herzog, Micheál Scanlon. Bioelectrochemistry of Cytochrome c in a Closed Bipolar Electrochemical Cell. Electrochemistry Communications, 2019, pp.106600. ⟨10.1016/j.elecom.2019.106600⟩. ⟨hal-02353776⟩
62 Consultations
131 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More