Potentiodynamic characteristics of ruthenized platinum electrodes in sulphuric acid solutions
The potentiodynamic response of ruthenized platinum electrodes in 0.5 M and 12 M H<sub>2</sub>SO<sub>4</sub> at 25°C is investigated. The E/I profiles depend on the electrode history and involve sintering-type effects. In 12 M H<sub>2</sub>SO<sub>4</sub&g...
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| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1983
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125759 https://www.sciencedirect.com/science/article/abs/pii/S0022072883804331 |
| Aporte de: |
| Sumario: | The potentiodynamic response of ruthenized platinum electrodes in 0.5 M and 12 M H<sub>2</sub>SO<sub>4</sub> at 25°C is investigated. The E/I profiles depend on the electrode history and involve sintering-type effects. In 12 M H<sub>2</sub>SO<sub>4</sub> they can be analysed in more detail because the separation of the H-adatom and O-electroadsorption potential ranges is greater than in 0.5 M H<sub>2</sub>SO<sub>4</sub>. Thus, four different stages related to the oxide layer are distinguished. The interpretation of the corresponding overall processes is given in terms of the equilibrium potentials of the Ru/H<sub>2</sub>O system and the reversibility characteristics of the different stages derived from the various potential/time perturbation programs are discussed through reaction patterns previously considered for these reactions on other noble metals. |
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