Dynamics of roughness and surface reactions at solid electrodes

Surface disorder and random roughness of electrode surfaces are discussed in terms of Euclidean and fractal models. Roughness development at different metals results from two contributions operating in opposite directions, namely shadowing between growing clusters which leads to rough surfaces, and...

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Detalles Bibliográficos
Autores principales: Arvia, Alejandro Jorge, Salvarezza, Roberto Carlos, Vara, J. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1992
Materias:
Ciencias Exactas
Química
Fractals
Electrode roughness
Monte Carlo simulations
Growth modes
Surface dynamics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/119355
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-119355
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
Fractals
Electrode roughness
Monte Carlo simulations
Growth modes
Surface dynamics
spellingShingle Ciencias Exactas
Química
Fractals
Electrode roughness
Monte Carlo simulations
Growth modes
Surface dynamics
Arvia, Alejandro Jorge
Salvarezza, Roberto Carlos
Vara, J. M.
Dynamics of roughness and surface reactions at solid electrodes
topic_facet Ciencias Exactas
Química
Fractals
Electrode roughness
Monte Carlo simulations
Growth modes
Surface dynamics
description Surface disorder and random roughness of electrode surfaces are discussed in terms of Euclidean and fractal models. Roughness development at different metals results from two contributions operating in opposite directions, namely shadowing between growing clusters which leads to rough surfaces, and surface diffusion phenomena which tend to smooth surface irregularities. The second contribution depends on the specific mobility of the deposited metal atoms, the temperature, and the electrolyte composition. Monte Carlo simulations based upon nucleation and growth models show that the growth processes controlled by either surface reactions or mass transport of reacting species, including surface diffusion, produce compact deposits with a weak surface disorder. Conversely, the growth process under mass transport control involving a negligible surface diffusion generates open structures with a strong surface disorder. Rough metal deposits exhibiting a fractal behaviour are considered. The fractal dimension provides a quantitative description of the degree of disorder, the growth mechanism and the reactivity of those surfaces in relation to electrocatalysis.
format Articulo
Articulo
author Arvia, Alejandro Jorge
Salvarezza, Roberto Carlos
Vara, J. M.
author_facet Arvia, Alejandro Jorge
Salvarezza, Roberto Carlos
Vara, J. M.
author_sort Arvia, Alejandro Jorge
title Dynamics of roughness and surface reactions at solid electrodes
title_short Dynamics of roughness and surface reactions at solid electrodes
title_full Dynamics of roughness and surface reactions at solid electrodes
title_fullStr Dynamics of roughness and surface reactions at solid electrodes
title_full_unstemmed Dynamics of roughness and surface reactions at solid electrodes
title_sort dynamics of roughness and surface reactions at solid electrodes
publishDate 1992
url http://sedici.unlp.edu.ar/handle/10915/119355
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AT salvarezzarobertocarlos dynamicsofroughnessandsurfacereactionsatsolidelectrodes
AT varajm dynamicsofroughnessandsurfacereactionsatsolidelectrodes
bdutipo_str Repositorios
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