The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
Evidences of a slow Cu(OH)<sub>2</sub> phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, elect...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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1988
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79926 |
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I19-R120-10915-79926 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Química Electroquímica Cobre Discos Rotatorios potentiodynamic alkaline solutions electroreduction |
| spellingShingle |
Ciencias Exactas Química Electroquímica Cobre Discos Rotatorios potentiodynamic alkaline solutions electroreduction Gomez Becerra, J. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| topic_facet |
Ciencias Exactas Química Electroquímica Cobre Discos Rotatorios potentiodynamic alkaline solutions electroreduction |
| description |
Evidences of a slow Cu(OH)<sub>2</sub> phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, electrochemical results can be explained by admitting two limiting complex structures of the anodic layers namely Cu/Cu<sub>2</sub>O (porous inner layer)/CuO (outer layer) and Cu/Cu<sub>2</sub>O (porous inner layer)/CuO/Cu(OH)<sub>2</sub> (outer layer). The formation of the Cu(OH)<sub>2</sub> layer fits a progressive nucleation and 2-D growth under charge transfer control in the −0.175 ⩽ E ⩽ −0.10 V range and an instantaneous nucleation and 2-D growth mechanism under charge transfer control in the −0.20 ⩽ E ⩽ −0.18 V. A well-defined voltammetric peak multiplicity can be distinguished for the electrochemical of each complex anodic layer. These results furnish a reasonable explanation to discrepancies observed in the literature for the electroformation and electroreduction of anodic layers formed on copper in alkaline solutions. |
| format |
Articulo Articulo |
| author |
Gomez Becerra, J. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_facet |
Gomez Becerra, J. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_sort |
Gomez Becerra, J. |
| title |
The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| title_short |
The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| title_full |
The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| title_fullStr |
The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| title_full_unstemmed |
The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| title_sort |
influence of slow cu(oh)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions |
| publishDate |
1988 |
| url |
http://sedici.unlp.edu.ar/handle/10915/79926 |
| work_keys_str_mv |
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Repositorios |
| _version_ |
1764820487335051264 |