New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes
New insight on the behavior of the irreversible adsorption and underpotential deposition of thallium on platinum (111) and vicinal surfaces in acid electrolytes
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.
thallium, irreversible adsorption, underpotential deposition, single crystal, anions
319-325
Rodriguez, P.
616b3a34-716f-4b67-9a64-2c190d5638a5
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Herrero, E.
463721cd-c910-407a-8c3c-85eaf6550a21
Feliu, J.M.
7768e11c-c05d-447d-a38d-f939c1fb4bab
1 January 2015
Rodriguez, P.
616b3a34-716f-4b67-9a64-2c190d5638a5
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Herrero, E.
463721cd-c910-407a-8c3c-85eaf6550a21
Feliu, J.M.
7768e11c-c05d-447d-a38d-f939c1fb4bab
Rodriguez, P., Garcia-Araez, Nuria, Herrero, E. and 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, .
(doi:10.1016/j.electacta.2014.11.019).
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.
Text
AdsIrrev_UPD_Talio_Pt111_reffinal.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 4 November 2014
e-pub ahead of print date: 7 November 2014
Published date: 1 January 2015
Keywords:
thallium, irreversible adsorption, underpotential deposition, single crystal, anions
Organisations:
Electrochemistry
Identifiers
Local EPrints ID: 375396
URI: http://eprints.soton.ac.uk/id/eprint/375396
ISSN: 0013-4686
PURE UUID: e76e1dd8-9452-4a47-b6fe-dfa5dceadd99
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Date deposited: 23 Mar 2015 13:45
Last modified: 15 Mar 2024 03:46
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Contributors
Author:
P. Rodriguez
Author:
E. Herrero
Author:
J.M. Feliu
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