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dc.contributor.author
Sieben, Juan Manuel
dc.contributor.author
Duarte, Marta María Elena
dc.contributor.author
Mayer, Carlos Enrique
dc.date.available
2019-05-08T20:32:38Z
dc.date.issued
2008-04
dc.identifier.citation
Sieben, Juan Manuel; Duarte, Marta María Elena; Mayer, Carlos Enrique; Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation; Springer; Journal of Applied Electrochemistry; 38; 4; 4-2008; 483-490
dc.identifier.issn
0021-891X
dc.identifier.uri
http://hdl.handle.net/11336/75915
dc.description.abstract
Methanol electrooxidation was investigated on Pt-Ru electrocatalysts supported on glassy carbon. The catalysts were prepared by electrodeposition from solutions containing chloroplatinic acid and ruthenium chloride. Bulk composition analysis of the Pt-Ru catalyst was performed using an X-ray detector for energy dispersive spectroscopy analysis (EDX). Three different compositions were analyzed in the range 0-20 at.% Ru content. Tafel plots for the oxidation of methanol in solutions containing 0.1-2 M CH3OH, and in the temperature range 23-50 °C showed a reasonably well-defined linear region. The slope of the Tafel plots was found to depend on the ruthenium composition. The lower slope was determined for the Pt catalyst, varying between 100 and 120 mV dec-1. The values calculated for the alloys were higher, ranging from 120 to 140 mV dec-1. The reaction order for methanol varies from 0.5 to 0.8, increasing with the ruthenium content. The activation energy calculated from Arrhenius plots was found to change with the catalyst composition, showing a lower value around 30 kJ mol-1 for the alloys, and a higher value, of 58.8 kJ mol-1, for platinum. The effect of ruthenium content is explained by the bifunctional reaction mechanism.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Catalyst
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Electrodeposition
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Methanol
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Platinum
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Ruthenium
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
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Recubrimientos y Películas
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Ingeniería de los Materiales
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Supported Pt and Pt–Ru catalysts prepared by potentiostatic electrodeposition for methanol electrooxidation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-05-06T16:15:50Z
dc.identifier.eissn
1572-8838
dc.journal.volume
38
dc.journal.number
4
dc.journal.pagination
483-490
dc.journal.pais
Alemania
dc.journal.ciudad
Berlín
dc.description.fil
Fil: Sieben, Juan Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
dc.description.fil
Fil: Duarte, Marta María Elena. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
dc.description.fil
Fil: Mayer, Carlos Enrique. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
dc.journal.title
Journal of Applied Electrochemistry
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10800-007-9462-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10800-007-9462-6
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