Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte
Two almost reversible electrochemical systems are detected during the potentiodynamic anodization of polycrystalline palladium in 1 M H2SO4 and 1 M HClO<sub>4</sub> by applying the triangular modulated triangular potential sweep technique. The first electrochemical system which appears i...
Guardado en:
| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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1984
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/84114 |
| Aporte de: |
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I19-R120-10915-84114 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Química potentiodynamic polycrystalline Electroquímica Electrólitos Oxígeno Electrodos |
| spellingShingle |
Ciencias Exactas Química potentiodynamic polycrystalline Electroquímica Electrólitos Oxígeno Electrodos Bolzán, Agustín E. Chialvo, Abel Cesar Arvia, Alejandro Jorge Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| topic_facet |
Ciencias Exactas Química potentiodynamic polycrystalline Electroquímica Electrólitos Oxígeno Electrodos |
| description |
Two almost reversible electrochemical systems are detected during the potentiodynamic anodization of polycrystalline palladium in 1 M H2SO4 and 1 M HClO<sub>4</sub> by applying the triangular modulated triangular potential sweep technique. The first electrochemical system which appears in the 0.7–0.9 V range (vs. RHE) corresponds to the reaction Pd+H<sub>2</sub>O=PdOH+H<sup>+</sup>+e<sup>−</sup> whose reversible potential is estimated as 0.80±0.02 V and the average half-life time of PdOH species is estimated as 6×10<sup>−3</sup> s.
The second electrochemical system appears when the anodizing potential sweep extends to the oxygen evolution potential region. The appearance of the second electrochemical system is accompanied by a change in colour of the electrode surface, a shift of the current-potential curve of the oxygen evolution reaction and an increase in thickness of the oxide anodic layer. The reversible response is tentatively assigned to the PdO<sub>2</sub>/PdO<sub>3</sub> redox couple. |
| format |
Articulo Articulo |
| author |
Bolzán, Agustín E. Chialvo, Abel Cesar Arvia, Alejandro Jorge |
| author_facet |
Bolzán, Agustín E. Chialvo, Abel Cesar Arvia, Alejandro Jorge |
| author_sort |
Bolzán, Agustín E. |
| title |
Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| title_short |
Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| title_full |
Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| title_fullStr |
Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| title_full_unstemmed |
Fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| title_sort |
fast faradaic processes observed during the potentiodynamic polarization of polycrystalline palladium in acid electrolyte |
| publishDate |
1984 |
| url |
http://sedici.unlp.edu.ar/handle/10915/84114 |
| work_keys_str_mv |
AT bolzanagustine fastfaradaicprocessesobservedduringthepotentiodynamicpolarizationofpolycrystallinepalladiuminacidelectrolyte AT chialvoabelcesar fastfaradaicprocessesobservedduringthepotentiodynamicpolarizationofpolycrystallinepalladiuminacidelectrolyte AT arviaalejandrojorge fastfaradaicprocessesobservedduringthepotentiodynamicpolarizationofpolycrystallinepalladiuminacidelectrolyte |
| bdutipo_str |
Repositorios |
| _version_ |
1764820488389918723 |