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dc.contributor.author
Fernández, Pablo Sebastián
dc.contributor.author
Tereshchuk, Polina
dc.contributor.author
Angelucci, Camilo A.
dc.contributor.author
Gomes, Janaina F.
dc.contributor.author
Garcia, Amanda C.
dc.contributor.author
Martins, Cauê A.
dc.contributor.author
Camara, Giuseppe A.
dc.contributor.author
Martins, María Elisa
dc.contributor.author
Da Silva, Juarez L. F.
dc.contributor.author
Tremiliosi Filho, Germano
dc.date.available
2019-04-30T19:21:00Z
dc.date.issued
2016-08
dc.identifier.citation
Fernández, Pablo Sebastián; Tereshchuk, Polina; Angelucci, Camilo A.; Gomes, Janaina F.; Garcia, Amanda C.; et al.; How do random superficial defects influence the electro-oxidation of glycerol on Pt(111) surfaces?; Royal Society of Chemistry; Physical Chemistry Chemical Physics; 18; 36; 8-2016; 25582-25591
dc.identifier.issn
1463-9076
dc.identifier.uri
http://hdl.handle.net/11336/75377
dc.description.abstract
The glycerol electrooxidation reaction (GEOR) has attracted huge interest in the last decade due to the very low price and availability of this polyol. In this work, we studied the GEOR on Pt(111) electrodes by introducing different densities of random defects. Our results showed that the generation of defects on Pt(111) slightly modified the GEOR onset potential, however it generates changes in the voltammetric oxidation charges and also in the relative production of CO2 to carbonyl containing compounds, CO. The voltammetric profiles in the forward scan show two oxidation peaks. FTIR data show that the first one is connected with the GlOH dissociative adsorption to form CO (and others intermediates) while the second one, at higher potentials, matches the onsets of the CO oxidation to CO2 and the CO production. FTIR also confirms that the lower activity of defected electrodes at lower potentials is connected to a higher CO poisoning. DFT calculations show that the presence of CO molecules on a Pt defected surface keeps water and GlOH molecules far from the surface and linked by H bonds. This paper is the last of a series of three works where we explore the GEOR on an important number of different Pt surfaces. These works show that it is difficult to oxidize GlOH at potentials lower than 0.6 V (under our experimental conditions) without suffering an important electrode poisoning (mainly by CO). Since the structure of nanoparticles might be mimicked by defected single crystals, these sets of reports provide a considerable amount of information concerning the influence of such surfaces towards GlOH reaction in acidic media. Therefore, if the well-known "nano"-effect does not produce substantial changes in the activity of Pt materials, they are not useful to be applied in a Direct Glycerol Fuel Cell (DGFC). On the other hand, it is very interesting that the density of electrode defects permits us to tune the relative production of CO2 to CO.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Glycerol
dc.subject
Platinum Single Crystals
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Surface Defects
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Ftir
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Dft
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
How do random superficial defects influence the electro-oxidation of glycerol on Pt(111) surfaces?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-04-23T15:10:58Z
dc.journal.volume
18
dc.journal.number
36
dc.journal.pagination
25582-25591
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Fernández, Pablo Sebastián. Universidade Estadual de Campinas; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Tereshchuk, Polina. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Angelucci, Camilo A.. Universidade Federal do ABC; Brasil
dc.description.fil
Fil: Gomes, Janaina F.. Universidade Federal de São Carlos; Brasil
dc.description.fil
Fil: Garcia, Amanda C.. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Martins, Cauê A.. Universidade Federal da Grande Dourados; Brasil
dc.description.fil
Fil: Camara, Giuseppe A.. Universidade Federal do Mato Grosso do Sul; Brasil
dc.description.fil
Fil: Martins, María Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Da Silva, Juarez L. F.. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Tremiliosi Filho, Germano. Universidade de Sao Paulo; Brasil
dc.journal.title
Physical Chemistry Chemical Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/c6cp04768h
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2016/CP/C6CP04768H
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