Changes in the electrochemical response of noble metals produced by square-wave potential perturbations : A new technique for the preparation of reproducible electrode surfaces of interest in electrocatalysis
A square-wave potential anodizing procedure to obtain noble metal surfaces with both a controlled roughness and a reproducible electrochemical response is presented. The influence of the characteristics of the square-wave potential perturbation are systematically studied. The modification of the sur...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1983 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/79603 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79603 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Exactas Química Electroquímica Metal Electrodos electrocatalysis square-wave potential metales nobles noble metals |
| Sumario: | A square-wave potential anodizing procedure to obtain noble metal surfaces with both a controlled roughness and a reproducible electrochemical response is presented. The influence of the characteristics of the square-wave potential perturbation are systematically studied. The modification of the surface takes place through the formation of a hydrated platinum oxide layer which is later electroreduced. The mechanism of growth of the hydrated oxide layer under both square-wave potential perturbation and potentiostatic conditions is critically discussed in terms of a complex sandwich-type structure. |
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