Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction

The ellipsometric characteristics of relatively thick hydrous Pt oxide layers (HPtOLs) produced by oxidation- reduction cycling in the 0–2.4 V range in 1 M H<sub>2</sub>SO<sub>4</sub>, and the surface topography of electrodispersed Pt electrodes (EDPtEs) obtained by electrore...

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Autores principales: Zerbino, Jorge Omar, Perdriel, Carlos L., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1993
Materias:
Ciencias Exactas
Química
Pt oxide layers
Oxidation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/120781
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-120781
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
Pt oxide layers
Oxidation
spellingShingle Ciencias Exactas
Química
Pt oxide layers
Oxidation
Zerbino, Jorge Omar
Perdriel, Carlos L.
Arvia, Alejandro Jorge
Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
topic_facet Ciencias Exactas
Química
Pt oxide layers
Oxidation
description The ellipsometric characteristics of relatively thick hydrous Pt oxide layers (HPtOLs) produced by oxidation- reduction cycling in the 0–2.4 V range in 1 M H<sub>2</sub>SO<sub>4</sub>, and the surface topography of electrodispersed Pt electrodes (EDPtEs) obtained by electroreducing the HPtOLs have been determined in the 400–700 nm range at 25 °C. The HPtOL is light absorbing and can be described as a layer made up of H<sub>2</sub>O and Pt oxide. The water content increases with increasing layer thickness, approaching a PttO<sub>2</sub>-to-H<sub>2</sub>O molar ratio of about 4. The EDPtE resulting from the slow electroreduction of HPtOL can be described as a rough structure with a metal-to-void ratio close to 0.5, which is consistent with a brush-like geometry.
format Articulo
Articulo
author Zerbino, Jorge Omar
Perdriel, Carlos L.
Arvia, Alejandro Jorge
author_facet Zerbino, Jorge Omar
Perdriel, Carlos L.
Arvia, Alejandro Jorge
author_sort Zerbino, Jorge Omar
title Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
title_short Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
title_full Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
title_fullStr Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
title_full_unstemmed Ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
title_sort ellipsometry of hydrous platinum oxide layers and electrodispersed platinum surfaces resulting from their electroreduction
publishDate 1993
url http://sedici.unlp.edu.ar/handle/10915/120781
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AT perdrielcarlosl ellipsometryofhydrousplatinumoxidelayersandelectrodispersedplatinumsurfacesresultingfromtheirelectroreduction
AT arviaalejandrojorge ellipsometryofhydrousplatinumoxidelayersandelectrodispersedplatinumsurfacesresultingfromtheirelectroreduction
bdutipo_str Repositorios
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