Electrochemical study of the first layers of oxide formed on copper in carbonate - bicarbonate solutions
The electrochemical behavior of copper electrodes in different carbonate bicarbonate solutions, with emphasis in the potential region of Cu(I) aide electroformation and electro-reduction has been studied by voltammetric techniques, scanning electron microscopy (SEM) and electrochemical impedance spe...
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| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2003
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/167218 |
| Aporte de: |
| Sumario: | The electrochemical behavior of copper electrodes in different carbonate bicarbonate solutions, with emphasis in the potential region of Cu(I) aide electroformation and electro-reduction has been studied by voltammetric techniques, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The occurrence of both chemical surface transformations and dissolution processes involving the species formed during the electrochemical reaction are reported. The open circuit experiments reveal the stability of CuO in spite of the presence of bicarbonate as the aggressive ion. SEM micrographs of the electrode surface allow the characteristics of the different surface products to be distinguished. Capacitance values obtained by EIS reflect the porous nature of the first oxide film electroformed. |
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