The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes

The electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs...

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Detalles Bibliográficos
Autores principales:	Martins, María Elisa, Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1998
Materias:	Ciencias Exactas Química Mercury electrodeposition Mercury underpotential electrodeposition Platinum electrode topography Mercury penetration into platinum Columnar-structured electrode
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/118202
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-118202
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 Mercury electrodeposition Mercury underpotential electrodeposition Platinum electrode topography Mercury penetration into platinum Columnar-structured electrode
spellingShingle	Ciencias Exactas Química Mercury electrodeposition Mercury underpotential electrodeposition Platinum electrode topography Mercury penetration into platinum Columnar-structured electrode Martins, María Elisa Salvarezza, Roberto Carlos Arvia, Alejandro Jorge The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
topic_facet	Ciencias Exactas Química Mercury electrodeposition Mercury underpotential electrodeposition Platinum electrode topography Mercury penetration into platinum Columnar-structured electrode
description	The electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs-Pt substrates provides information about surface processes which are not easily detected on conventional smooth Pt. At moderate and high potential scan rates Hg electrodeposition under mass transport control on cs-Pt yields a non-equilibrium complex deposit consisting of 2d and 3d Hg domains, and Pt-Hg alloy coexisting with bare Pt domains at intercolumnar voids. The dynamics of these domains approaching equilibrium can be followed by conventional voltammetry. The kinetics of Hg penetration into bulk Pt results from a Hg atom shift to a position underlying the first layer of Pt atoms followed by a diffusion-controlled penetration into bulk Pt. The Hg atom diffusion coefficient into bulk Pt results in D≅2×10<sup>−17</sup> cm<sup>2</sup> s<sup>−1</sup>
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	The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_short	The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_full	The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_fullStr	The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_full_unstemmed	The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_sort	electrodeposition of mercury from aqueous hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
publishDate	1998
url	http://sedici.unlp.edu.ar/handle/10915/118202
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bdutipo_str	Repositorios
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The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes

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