New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes

P. Rodriguez; N. García-Aráez; E. Herrero; J. M. Feliu

doi:10.1016/j.electacta.2014.11.019

New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes

P. Rodriguez^*, N. García-Aráez, E. Herrero, J. M. Feliu

^*Corresponding author for this work

Chemistry

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Abstract

We report, for the first time, the electrochemical behavior of thallium irreversibly adsorbed on Pt (111) and platinum stepped surfaces composed of (111) terraces and monoatomic steps. Similar to the case of thallium UPD, the voltammograms obtained after thallium irreversible adsorption present three characteristic features. After a careful analysis of the effect of the thallium concentration, the concentration and nature of the anion of the supporting electrolyte and the pH of the solution on these voltammetric features, we have been able to ascribe these processes to Tl/Tl⁺ oxidation and anion adsorption on the Tl-modified surface. In addition, the results obtained with stepped surfaces, indicate that some of the features are clearly associated to the presence of (111) surface domains, and thus they could be used for the quantification of these sites.

Original language	English
Pages (from-to)	319-325
Number of pages	7
Journal	Electrochimica Acta
Volume	151
Early online date	7 Nov 2014
DOIs	https://doi.org/10.1016/j.electacta.2014.11.019 https://doi.org/10.1016/j.electacta.2014.11.019 https://doi.org/10.1016/j.electacta.2014.11.019
Publication status	Published - 1 Jan 2015

Keywords

Thallium
Irreversible adsorption
Underpotential deposition
Single crystal
Anions

ASJC Scopus subject areas

Electrochemistry
Chemical Engineering(all)

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Rodriguez_et_al_New_insight_behaviour_irreversible_adsorption_Electrochimica_Acta_2014
NOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published as P.Rodriguez, N.Garcia-Araez, E.Herrero, J.M.Feliu, New insight on the behaviour of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes, Electrochimica Acta http://dx.doi.org/10.1016/j.electacta.2014.11.019
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Rodriguez, P., García-Aráez, N., Herrero, E., & Feliu, J. M. (2015). New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes. Electrochimica Acta, 151, 319-325. Advance online publication. https://doi.org/10.1016/j.electacta.2014.11.019, https://doi.org/10.1016/j.electacta.2014.11.019, https://doi.org/10.1016/j.electacta.2014.11.019

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abstract = "We report, for the first time, the electrochemical behavior of thallium irreversibly adsorbed on Pt (111) and platinum stepped surfaces composed of (111) terraces and monoatomic steps. Similar to the case of thallium UPD, the voltammograms obtained after thallium irreversible adsorption present three characteristic features. After a careful analysis of the effect of the thallium concentration, the concentration and nature of the anion of the supporting electrolyte and the pH of the solution on these voltammetric features, we have been able to ascribe these processes to Tl/Tl+ oxidation and anion adsorption on the Tl-modified surface. In addition, the results obtained with stepped surfaces, indicate that some of the features are clearly associated to the presence of (111) surface domains, and thus they could be used for the quantification of these sites.",

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Rodriguez, P, García-Aráez, N, Herrero, E & Feliu, JM 2015, 'New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes', Electrochimica Acta, vol. 151, pp. 319-325. https://doi.org/10.1016/j.electacta.2014.11.019, https://doi.org/10.1016/j.electacta.2014.11.019, https://doi.org/10.1016/j.electacta.2014.11.019

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T1 - New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes

AU - Rodriguez, P.

AU - García-Aráez, N.

AU - Herrero, E.

AU - Feliu, J. M.

PY - 2015/1/1

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N2 - We report, for the first time, the electrochemical behavior of thallium irreversibly adsorbed on Pt (111) and platinum stepped surfaces composed of (111) terraces and monoatomic steps. Similar to the case of thallium UPD, the voltammograms obtained after thallium irreversible adsorption present three characteristic features. After a careful analysis of the effect of the thallium concentration, the concentration and nature of the anion of the supporting electrolyte and the pH of the solution on these voltammetric features, we have been able to ascribe these processes to Tl/Tl+ oxidation and anion adsorption on the Tl-modified surface. In addition, the results obtained with stepped surfaces, indicate that some of the features are clearly associated to the presence of (111) surface domains, and thus they could be used for the quantification of these sites.

AB - We report, for the first time, the electrochemical behavior of thallium irreversibly adsorbed on Pt (111) and platinum stepped surfaces composed of (111) terraces and monoatomic steps. Similar to the case of thallium UPD, the voltammograms obtained after thallium irreversible adsorption present three characteristic features. After a careful analysis of the effect of the thallium concentration, the concentration and nature of the anion of the supporting electrolyte and the pH of the solution on these voltammetric features, we have been able to ascribe these processes to Tl/Tl+ oxidation and anion adsorption on the Tl-modified surface. In addition, the results obtained with stepped surfaces, indicate that some of the features are clearly associated to the presence of (111) surface domains, and thus they could be used for the quantification of these sites.

KW - Thallium

KW - Irreversible adsorption

KW - Underpotential deposition

KW - Single crystal

KW - Anions

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Rodriguez P, García-Aráez N, Herrero E, Feliu JM. New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes. Electrochimica Acta. 2015 Jan 1;151:319-325. Epub 2014 Nov 7. doi: 10.1016/j.electacta.2014.11.019, 10.1016/j.electacta.2014.11.019, http://dx.doi.org/10.1016/j.electacta.2014.11.019

New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes

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Keywords

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