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Abstract:

In this work, the electrochemical response of Vanadium(V) species on magnetite film electrodes is investigated. Magnetite is deposited electrochemically on glassy carbon electrodes, with an intermediate layer of poly(thiophene) to avoid water infiltration. These electrodes show good reproducibility and stability up to pH = 2.0. Mononuclear V(V) species show low electroactivity on this surface. Cyclic voltammetry at low V(V) concentration shows that it is electroactive only at pH < 3. i.e. as VO2 +. A single reduction peak is observed at ~− 0.7 V vs SCE (at 50 mV s− 1), and an oxidation one at ~ 0.5 V vs SCE, indicating high irreversibility of the V(V)/V(IV) couple; these peaks are found to be solution phase reactions. These features are interpreted in terms of mononuclear V species. At higher V concentrations, where polymeric V(V) species are dominant, a somewhat higher electroactivity is observed, with two reduction peaks and two/three oxidation peaks. © 2018 Elsevier B.V.

Registro:

Documento: Artículo
Título:Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes
Autor:Dabrowski, S.G.; Tudino, M.B.; Molina, F.V.
Filiación:Instituto de Química Física de Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Conducting polymer; Cyclic voltammetry; Iron oxide; Carbon; Conducting polymers; Cyclic voltammetry; Electrodes; Glass membrane electrodes; Iron oxides; Magnetite; Reduction; Vanadium compounds; Electro-activity; Electrochemical behaviour; Electrochemical response; Glassy carbon electrodes; Intermediate layers; Magnetite films; Reproducibilities; Water infiltration; Electrochemical electrodes
Año:2018
Volumen:819
Página de inicio:283
Página de fin:288
DOI: http://dx.doi.org/10.1016/j.jelechem.2017.10.053
Título revista:Journal of Electroanalytical Chemistry
ISSN:15726657
CODEN:JECHE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15726657_v819_n_p283_Dabrowski

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Citas:

---------- APA ----------
Dabrowski, S.G., Tudino, M.B. & Molina, F.V. (2018) . Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes. Journal of Electroanalytical Chemistry, 819, 283-288.
http://dx.doi.org/10.1016/j.jelechem.2017.10.053
---------- CHICAGO ----------
Dabrowski, S.G., Tudino, M.B., Molina, F.V. "Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes" . Journal of Electroanalytical Chemistry 819 (2018) : 283-288.
http://dx.doi.org/10.1016/j.jelechem.2017.10.053
---------- MLA ----------
Dabrowski, S.G., Tudino, M.B., Molina, F.V. "Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes" . Journal of Electroanalytical Chemistry, vol. 819, 2018, pp. 283-288.
http://dx.doi.org/10.1016/j.jelechem.2017.10.053
---------- VANCOUVER ----------
Dabrowski, S.G., Tudino, M.B., Molina, F.V. Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes. 2018;819:283-288.
http://dx.doi.org/10.1016/j.jelechem.2017.10.053