Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes

Images of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscop...

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Detalles Bibliográficos
Autores principales: Gómez, J., Vázquez, L., Baró, A. M., Alonso, C., González, E., Gónzalez Velasco, J., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1988
Materias:
Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127150
https://www.sciencedirect.com/science/article/abs/pii/0022072888803140
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127150
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
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
spellingShingle Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
Gómez, J.
Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
topic_facet Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
description Images of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscopes can be established which allows one to find different structural details of these electrodes. The roughening increase produced by the electrochemical activation is explained tentatively through a generalized structural model consisting of an overlayer of sticking spheres of about 10 nm average diameter leaving inner interconnected channels of nearly the same average diameter and penetrating in the overlayer structure. The size of the spherical units is comparable to that of metal clusters involving the optimal ratio of surface to bulk atoms associated with the greatest catalytic activity.
format Articulo
Articulo
author Gómez, J.
Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
author_facet Gómez, J.
Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
author_sort Gómez, J.
title Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_short Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_full Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_fullStr Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_full_unstemmed Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_sort scanning tunneling microscopy (stm) and scanning electron microscopy (sem) of electrodispersed gold electrodes
publishDate 1988
url http://sedici.unlp.edu.ar/handle/10915/127150
https://www.sciencedirect.com/science/article/abs/pii/0022072888803140
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bdutipo_str Repositorios
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