The voltammetry of surfaces vicinal to Pt{110}: Structural complexity simplified by CO cooling
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Campo DC | Valor | Idioma |
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dc.contributor | Electroquímica de Superficies | es_ES |
dc.contributor.author | Attard, Gary A. | - |
dc.contributor.author | Hunter, Katherine | - |
dc.contributor.author | Wright, Edward | - |
dc.contributor.author | Sharman, Jonathan | - |
dc.contributor.author | Martínez-Hincapié, Ricardo | - |
dc.contributor.author | Feliu, Juan M. | - |
dc.contributor.other | Universidad de Alicante. Departamento de Química Física | es_ES |
dc.contributor.other | Universidad de Alicante. Instituto Universitario de Electroquímica | es_ES |
dc.date.accessioned | 2017-07-27T11:36:18Z | - |
dc.date.available | 2017-07-27T11:36:18Z | - |
dc.date.issued | 2017-05-15 | - |
dc.identifier.citation | Journal of Electroanalytical Chemistry. 2017, 793: 137-146. doi:10.1016/j.jelechem.2016.10.005 | es_ES |
dc.identifier.issn | 1572-6657 (Print) | - |
dc.identifier.issn | 1873-2569 (Online) | - |
dc.identifier.uri | http://hdl.handle.net/10045/68570 | - |
dc.description.abstract | By flame-annealing and cooling a series of Pt n{110} × {111} and Pt n{110} × {100} single crystal electrodes in a CO ambient, new insights into the nature of the electrosorption processes associated with Pt{110} voltammetry in aqueous acidic media are elucidated. For Pt n{110} × {111} electrodes, a systematic change in the intensities of so-called hydrogen underpotential (Hupd) and oxide adsorption voltammetric peaks (for two dimensionally ordered (1 × 1) terraces and linear {111} × {111}step sites) point to a lack of surface reconstruction with all surfaces adopting a (1 × 1) configuration. This is in contrast to hydrogen cooled analogues which give rise to significant residual surface disorder, probably associated with the excess 50% of atoms remaining atop of the surface upon deconstruction of the {110} − (1 × 2) terrace phase. In contrast, Pt n{110} × {100} stepped electrodes, when cooled in gaseous CO following flame-annealing, show a marked tendency towards surface reconstruction, even at low step densities. Variations in potential of the Pt{110}-(1 × 1) Hupd electrosorption peaks as a function of specific ion adsorption strength and pH point to weak specific adsorption for both anions (including perchlorate and fluoride) and cations (including Na+ and K+). CO charge-displacement measurements of the potential of zero total charge (PZTC) allow inferences to be made concerning the nature of the electrosorbed species in the hydrogen underpotential deposition (Hupd) region. Hence, a coherent interpretation of the complex voltammetric phenomena often displayed by platinum surfaces vicinal to the {110} plane is proposed. | es_ES |
dc.description.sponsorship | GAA acknowledges the financial support of the EPSRC towards a studentship for KH. RMH thankfully acknowledges support from Generalitat Valenciana under the Santiago Grisolia Program (GRISOLIA/2013/008). Partial support from MINECO (Spain) Project CTQ 2013-44083-P is greatly acknowledged. | es_ES |
dc.language | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | © 2016 Elsevier B.V. | es_ES |
dc.subject | Pt{110} | es_ES |
dc.subject | Cyclic voltammetry | es_ES |
dc.subject | Stepped surfaces | es_ES |
dc.subject | Electrosorption | es_ES |
dc.subject.other | Química Física | es_ES |
dc.title | The voltammetry of surfaces vicinal to Pt{110}: Structural complexity simplified by CO cooling | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.peerreviewed | si | es_ES |
dc.identifier.doi | 10.1016/j.jelechem.2016.10.005 | - |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.jelechem.2016.10.005 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//CTQ2013-44083-P | - |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas |
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2017_Attard_etal_JElectrChem_final.pdf | Versión final (acceso restringido) | 2,58 MB | Adobe PDF | Abrir Solicitar una copia |
2017_Attard_etal_JElectrChem_preprint.pdf | Preprint (acceso abierto) | 1,62 MB | Adobe PDF | Abrir Vista previa |
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