The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques

A simple method is presented for measuring the surface diffusion coefficients of Au and Pt atoms at electrodispersed electrodes of the same metals in contact with 0.5M H<sub>2</sub>SO<sub>4</sub>. The technique is based upon the time dependence of the surface roughness factor...

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Detalles Bibliográficos
Autores principales: Alonso, C., Salvarezza, Roberto Carlos, Vara, J. M., Arvia, Alejandro Jorge, Vazquez, L., Bartolome, A., Baro, A. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1990
Materias:
Ciencias Exactas
Química
Oro
Platino (Metal)
Electrodos
Evaluación
Electroquímica
Técnicas Electroquímicas
scanning tunneling microscopy
scanning electron microscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79873
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79873
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
Oro
Platino (Metal)
Electrodos
Evaluación
Electroquímica
Técnicas Electroquímicas
scanning tunneling microscopy
scanning electron microscopy
spellingShingle Ciencias Exactas
Química
Oro
Platino (Metal)
Electrodos
Evaluación
Electroquímica
Técnicas Electroquímicas
scanning tunneling microscopy
scanning electron microscopy
Alonso, C.
Salvarezza, Roberto Carlos
Vara, J. M.
Arvia, Alejandro Jorge
Vazquez, L.
Bartolome, A.
Baro, A. M.
The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
topic_facet Ciencias Exactas
Química
Oro
Platino (Metal)
Electrodos
Evaluación
Electroquímica
Técnicas Electroquímicas
scanning tunneling microscopy
scanning electron microscopy
description A simple method is presented for measuring the surface diffusion coefficients of Au and Pt atoms at electrodispersed electrodes of the same metals in contact with 0.5M H<sub>2</sub>SO<sub>4</sub>. The technique is based upon the time dependence of the surface roughness factor of electrodispersed metal overlayers. The method requires a model for the surface roughness of the metal structure. The model is deduced from microscopic measurements by a STM integrated into a conventional SEM microscope. This allows the relationship between the roughness factor and the area of the surface structure to be obtained. For Au and Pt in contact with an electrolyte solution, the values of our diffusion coefficients are higher than those reported in vacuum at the same temperature.
format Articulo
Articulo
author Alonso, C.
Salvarezza, Roberto Carlos
Vara, J. M.
Arvia, Alejandro Jorge
Vazquez, L.
Bartolome, A.
Baro, A. M.
author_facet Alonso, C.
Salvarezza, Roberto Carlos
Vara, J. M.
Arvia, Alejandro Jorge
Vazquez, L.
Bartolome, A.
Baro, A. M.
author_sort Alonso, C.
title The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
title_short The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
title_full The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
title_fullStr The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
title_full_unstemmed The evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined STM-SEM imaging and electrochemical techniques
title_sort evaluation of surface diffusion coefficients of gold and platinum atoms at electrochemical interfaces from combined stm-sem imaging and electrochemical techniques
publishDate 1990
url http://sedici.unlp.edu.ar/handle/10915/79873
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