A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes

The early stages of metal (M) electrodeposition (M = Cu, Ag, Pb, Cd and Hg) on columnar and smooth Pt substrates (S) were investigated in acid solutions applying potentiodynamic techniques. At moderate and high potential scanning rates M electrodeposition on columnar substrates yields M domains whic...

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Autores principales: Martins, María Elisa, Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1996
Materias:
Ciencias Exactas
Química
Metal electrodeposition
Surface diffusion
Electrode roughness
Growth modes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/118428
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-118428
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
Metal electrodeposition
Surface diffusion
Electrode roughness
Growth modes
spellingShingle Ciencias Exactas
Química
Metal electrodeposition
Surface diffusion
Electrode roughness
Growth modes
Martins, María Elisa
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
topic_facet Ciencias Exactas
Química
Metal electrodeposition
Surface diffusion
Electrode roughness
Growth modes
description The early stages of metal (M) electrodeposition (M = Cu, Ag, Pb, Cd and Hg) on columnar and smooth Pt substrates (S) were investigated in acid solutions applying potentiodynamic techniques. At moderate and high potential scanning rates M electrodeposition on columnar substrates yields M domains which are dominated either by M-S interactions (M-S domains) or M-M interactions (M-M domains) as deduced from anodic stripping data. The roughness of S, the rate of surface diffusion of M atoms and the exchange current density of the M/M<sup>z+</sup> electrode reaction have a remarkable influence on the growth mode of the M overlayer. Rearrangements involving M-S and M-M domains leading to equilibrium at the M overlayer were deduced from voltammetric data. The rate of these rearrangements depends mainly on the surface diffusion of M atoms. Correlations between the charge related to M-S domains and ∆H<sub>s</sub>, the enthalpy of sublimation, and T<sub>m</sub>, the melting temperature of M, were established. These parameters reflect the trend of M atoms to participate in surface diffusion processes.
format Articulo
Articulo
author Martins, María Elisa
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_facet Martins, María Elisa
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_sort Martins, María Elisa
title A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
title_short A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
title_full A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
title_fullStr A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
title_full_unstemmed A comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
title_sort comparative study of the early stages of mercury, cadmium, lead, silver and copper electrodeposition on columnar and smooth platinum electrodes
publishDate 1996
url http://sedici.unlp.edu.ar/handle/10915/118428
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