Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes
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...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15726657_v819_n_p283_Dabrowski |
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todo:paper_15726657_v819_n_p283_Dabrowski2023-10-03T16:27:34Z Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes Dabrowski, S.G. Tudino, M.B. Molina, F.V. 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 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15726657_v819_n_p283_Dabrowski |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Dabrowski, S.G. Tudino, M.B. Molina, F.V. Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Dabrowski, S.G. Tudino, M.B. Molina, F.V. |
| author_facet |
Dabrowski, S.G. Tudino, M.B. Molina, F.V. |
| author_sort |
Dabrowski, S.G. |
| title |
Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| title_short |
Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| title_full |
Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| title_fullStr |
Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| title_full_unstemmed |
Electrochemical behaviour of Vanadium(V) on electrochemically synthesized magnetite film electrodes |
| title_sort |
electrochemical behaviour of vanadium(v) on electrochemically synthesized magnetite film electrodes |
| url |
http://hdl.handle.net/20.500.12110/paper_15726657_v819_n_p283_Dabrowski |
| work_keys_str_mv |
AT dabrowskisg electrochemicalbehaviourofvanadiumvonelectrochemicallysynthesizedmagnetitefilmelectrodes AT tudinomb electrochemicalbehaviourofvanadiumvonelectrochemicallysynthesizedmagnetitefilmelectrodes AT molinafv electrochemicalbehaviourofvanadiumvonelectrochemicallysynthesizedmagnetitefilmelectrodes |
| _version_ |
1807321371150123008 |