Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments

Página do item simplificado
dc.contributor.authorCiapina, Eduardo G. [UNESP]
dc.contributor.authorLopes, Pietro P.
dc.contributor.authorSubbaraman, Ram
dc.contributor.authorTicianelli, Edson A.
dc.contributor.authorStamenkovic, Vojislav
dc.contributor.authorStrmcnik, Dusan
dc.contributor.authorMarkovic, Nenad M.
dc.contributor.institutionMaterials Science Division, Argonne National Laboratory
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T16:39:00Z
dc.date.available2018-12-11T16:39:00Z
dc.date.issued2015-08-12
dc.description.abstractAbstract We use the rotating ring disk (RRDE) method to study activity-selectivity relationships for the oxygen reduction reaction (ORR) on Pt(111) modified by various surface coverages of adsorbed CN<inf>ad</inf> (Θ<inf>CNad</inf>). The results demonstrate that small variations in Θ<inf>CNad</inf> have dramatic effect on the ORR activity and peroxide production, resulting in volcano-like dependence with an optimal surface coverage of Θ<inf>CNad</inf> = 0.3 ML. These relationships can be simply explained by balancing electronic and ensemble effects of co-adsorbed CN<inf>ad</inf> and adsorbed spectator species from the supporting electrolytes, without the need for intermediate adsorption energy arguments. Although this study has focused on the Pt(111)-CN<inf>ad</inf>/H<inf>2</inf>SO<inf>4</inf> interface, the results and insight gained here are invaluable for controlling another dimension in the properties of electrochemical interfaces.en
dc.description.affiliationMaterials Science Division, Argonne National Laboratory
dc.description.affiliationFaculdade de Engenharia, UNESP - Univ. Estadual Paulista
dc.description.affiliationInstituto de Quimica de Sao Carlos, Universidade de Sao Paulo
dc.description.affiliationUnespFaculdade de Engenharia, UNESP - Univ. Estadual Paulista
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipIdU.S. Department of Energy: DE-AC02-06CH11357
dc.format.extent30-33
dc.identifierhttp://dx.doi.org/10.1016/j.elecom.2015.07.020
dc.identifier.citationElectrochemistry Communications, v. 60, p. 30-33.
dc.identifier.doi10.1016/j.elecom.2015.07.020
dc.identifier.file2-s2.0-84938884065.pdf
dc.identifier.issn1388-2481
dc.identifier.scopus2-s2.0-84938884065
dc.identifier.urihttp://hdl.handle.net/11449/167954
dc.language.isoeng
dc.relation.ispartofElectrochemistry Communications
dc.relation.ispartofsjr1,606
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCatalyst selectivity
dc.subjectElectrocatalysis
dc.subjectElectrochemical interfaces
dc.subjectElectronic effects
dc.subjectEnsemble effects
dc.subjectOxygen reduction reaction
dc.titleSurface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environmentsen
dc.typeArtigo
unesp.author.lattes8334812135002435[1]
unesp.author.orcid0000-0002-3718-0493[1]

Arquivos

Pacote Original

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
2-s2.0-84938884065.pdf
Tamanho:
591.89 KB
Formato:
Adobe Portable Document Format
Descrição:
Baixar

Coleções

Artigos