Electrochemical faceting of polycrystalline gold in 1 M H2SO4

Electrochemical faceting of polycrystalline (pc) gold electrodes in 1 M H2SO4 was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potenti...

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Detalles Bibliográficos
Autores principales:	Perdriel, Carlos L., Arvia, Alejandro Jorge, Ipohorski, Miguel
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1986
Materias:	Ciencias Exactas Química Electroquímica polycrystalline Oro scanning electron microscopy Cristalografía Cinética química
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84458
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84458
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 Electroquímica polycrystalline Oro scanning electron microscopy Cristalografía Cinética química
spellingShingle	Ciencias Exactas Química Electroquímica polycrystalline Oro scanning electron microscopy Cristalografía Cinética química Perdriel, Carlos L. Arvia, Alejandro Jorge Ipohorski, Miguel Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
topic_facet	Ciencias Exactas Química Electroquímica polycrystalline Oro scanning electron microscopy Cristalografía Cinética química
description	Electrochemical faceting of polycrystalline (pc) gold electrodes in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub> was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potential signal in the 2–4 kHz range and upper and lower potential limits ranging between 1.44 and 1.60 V (vs. RHE) and 0.10 and 1.10 V, respectively. The degree of faceting was followed voltammetrically principally through the O-electroadsorption/electrodesorption process. Electrochemical information was complemented with scanning electron microscopic observations. The results are discussed in terms of the equilibrium potential of reactions involving different gold species, and the potential of zero charge, hydrophobicity and anion adsorbability of the (110), (100) and (111) crystallographic faces of gold. The kinetics of electrochemical faceting of gold can be explained through the two-stage mechanism proposed earlier for polycrystalline platinum in acid electrolyte.
format	Articulo Articulo
author	Perdriel, Carlos L. Arvia, Alejandro Jorge Ipohorski, Miguel
author_facet	Perdriel, Carlos L. Arvia, Alejandro Jorge Ipohorski, Miguel
author_sort	Perdriel, Carlos L.
title	Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_short	Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_full	Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_fullStr	Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_full_unstemmed	Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_sort	electrochemical faceting of polycrystalline gold in 1 <i>m</i> h<sub>2</sub>so<sub>4</sub>
publishDate	1986
url	http://sedici.unlp.edu.ar/handle/10915/84458
work_keys_str_mv	AT perdrielcarlosl electrochemicalfacetingofpolycrystallinegoldin1imihsub2subsosub4sub AT arviaalejandrojorge electrochemicalfacetingofpolycrystallinegoldin1imihsub2subsosub4sub AT ipohorskimiguel electrochemicalfacetingofpolycrystallinegoldin1imihsub2subsosub4sub
bdutipo_str	Repositorios
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Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>

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