Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold

The voltammetric and surface conductance (SC) responses of thin gold film electrodes during the deposition and stripping of mercury in 0.1 M HC104 solutions have been measured for (i) the potential region corresponding to the underpotential deposition (upd) and stripping (ups), (ii) the formation an...

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Autores principales:	Romeo, F.M., Tucceri, R.I., Posadas, D.
Formato:	JOUR
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_07437463_v6_n4_p839_Romeo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_07437463_v6_n4_p839_Romeo2023-10-03T15:38:51Z Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold Romeo, F.M. Tucceri, R.I. Posadas, D. The voltammetric and surface conductance (SC) responses of thin gold film electrodes during the deposition and stripping of mercury in 0.1 M HC104 solutions have been measured for (i) the potential region corresponding to the underpotential deposition (upd) and stripping (ups), (ii) the formation and stripping of the Hg-Au bulk alloy, and (iii) the deposition and stripping of bulk Hg(0). The analysis of the experimental results shows that the upd mercury grows by an island mechanism up to ὓ 0.7. Linde's surface rule suggests the formation of an interstitial surface phase in this coverage range. The formation of bulk Hg-Au alloy occurs when ὓ = 1 but in the absence of bulk Hg(0). During the stripping of the alloy, the SC is only sensitive to the surface concentration of the Hg(upd) species. Only a relatively small amount of alloy is stripped off during the stripping cycle. It has been verified that the penetration of the mercury atoms into the bulk depends on the grain boundaries concentration. The changes in SC during the formation of bulk Hg(0) indicate that it is a more dense surface phase than the Hg(upd) surface phase. © 1990, American Chemical Society. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07437463_v6_n4_p839_Romeo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description	The voltammetric and surface conductance (SC) responses of thin gold film electrodes during the deposition and stripping of mercury in 0.1 M HC104 solutions have been measured for (i) the potential region corresponding to the underpotential deposition (upd) and stripping (ups), (ii) the formation and stripping of the Hg-Au bulk alloy, and (iii) the deposition and stripping of bulk Hg(0). The analysis of the experimental results shows that the upd mercury grows by an island mechanism up to ὓ 0.7. Linde's surface rule suggests the formation of an interstitial surface phase in this coverage range. The formation of bulk Hg-Au alloy occurs when ὓ = 1 but in the absence of bulk Hg(0). During the stripping of the alloy, the SC is only sensitive to the surface concentration of the Hg(upd) species. Only a relatively small amount of alloy is stripped off during the stripping cycle. It has been verified that the penetration of the mercury atoms into the bulk depends on the grain boundaries concentration. The changes in SC during the formation of bulk Hg(0) indicate that it is a more dense surface phase than the Hg(upd) surface phase. © 1990, American Chemical Society. All rights reserved.
format	JOUR
author	Romeo, F.M. Tucceri, R.I. Posadas, D.
spellingShingle	Romeo, F.M. Tucceri, R.I. Posadas, D. Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
author_facet	Romeo, F.M. Tucceri, R.I. Posadas, D.
author_sort	Romeo, F.M.
title	Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
title_short	Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
title_full	Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
title_fullStr	Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
title_full_unstemmed	Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold
title_sort	voltammetric and surface conductance study of the deposition and stripping of mercury on gold
url	http://hdl.handle.net/20.500.12110/paper_07437463_v6_n4_p839_Romeo
work_keys_str_mv	AT romeofm voltammetricandsurfaceconductancestudyofthedepositionandstrippingofmercuryongold AT tucceriri voltammetricandsurfaceconductancestudyofthedepositionandstrippingofmercuryongold AT posadasd voltammetricandsurfaceconductancestudyofthedepositionandstrippingofmercuryongold
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Voltammetric and Surface Conductance Study of the Deposition and Stripping of Mercury on Gold

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