Deposition and stripping processes of tin on gold film electrodes studied by surface conductance

The CV and surface conductance (SC) responses of tin species adsorbed on evaporated gold film electrodes were studied as a function of the potential window and the potential sweep rate. Sn adatoms were generated either, by reducing Sn(II) present in the solution (u p d) or by first irreversibly adso...

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Autores principales: Fonticelli, Mariano Hernán, Tucceri, Ricardo Ismael, Posadas, Dionisio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2004
Materias:
Química
Thin gold film electrodes
Surface conductance
Tin
u p d
Bulk deposition
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/113627
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-113627
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Thin gold film electrodes
Surface conductance
Tin
u p d
Bulk deposition
spellingShingle Química
Thin gold film electrodes
Surface conductance
Tin
u p d
Bulk deposition
Fonticelli, Mariano Hernán
Tucceri, Ricardo Ismael
Posadas, Dionisio
Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
topic_facet Química
Thin gold film electrodes
Surface conductance
Tin
u p d
Bulk deposition
description The CV and surface conductance (SC) responses of tin species adsorbed on evaporated gold film electrodes were studied as a function of the potential window and the potential sweep rate. Sn adatoms were generated either, by reducing Sn(II) present in the solution (u p d) or by first irreversibly adsorbing Sn(II) and then reducing it in the supporting electrolyte alone. The experimental results show that at potentials about E ≈ −0.25 V(versus SCE), all the Sn(II) is reduced to Sn(0) and this species is adsorbed on the electrode surface. The subsequent oxidation of Sn(0) leads to Sn(II)ad, adsorbed on the electrode. This species desorbs only when the Sn(II)ad is further oxidised to soluble Sn(IV). The number of electrons involved in the reduction of Sn(II) to Sn(0) and vice versa is two. On the other hand, the analysis of the resistance measurements at low coverage is made by applying the surface Linde’s rule. This leads to the conclusion that the Sn(0) behaves as an interstitial impurity. SC experiments, made in the potential region corresponding to Sn bulk deposition, suggest the formation of a bulk Sn–Au alloy.
format Articulo
Articulo
author Fonticelli, Mariano Hernán
Tucceri, Ricardo Ismael
Posadas, Dionisio
author_facet Fonticelli, Mariano Hernán
Tucceri, Ricardo Ismael
Posadas, Dionisio
author_sort Fonticelli, Mariano Hernán
title Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
title_short Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
title_full Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
title_fullStr Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
title_full_unstemmed Deposition and stripping processes of tin on gold film electrodes studied by surface conductance
title_sort deposition and stripping processes of tin on gold film electrodes studied by surface conductance
publishDate 2004
url http://sedici.unlp.edu.ar/handle/10915/113627
work_keys_str_mv AT fonticellimarianohernan depositionandstrippingprocessesoftinongoldfilmelectrodesstudiedbysurfaceconductance
AT tucceriricardoismael depositionandstrippingprocessesoftinongoldfilmelectrodesstudiedbysurfaceconductance
AT posadasdionisio depositionandstrippingprocessesoftinongoldfilmelectrodesstudiedbysurfaceconductance
bdutipo_str Repositorios
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