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

Detalhes bibliográficos
Autor(a) principal: Ciapina, Eduardo G. [UNESP]
Data de Publicação: 2015
Outros Autores: Lopes, Pietro P., Subbaraman, Ram, Ticianelli, Edson A., Stamenkovic, Vojislav, Strmcnik, Dusan, Markovic, Nenad M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.elecom.2015.07.020
http://hdl.handle.net/11449/167954
Resumo: Abstract 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.
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spelling Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environmentsCatalyst selectivityElectrocatalysisElectrochemical interfacesElectronic effectsEnsemble effectsOxygen reduction reactionAbstract 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.U.S. Department of EnergyMaterials Science Division, Argonne National LaboratoryFaculdade de Engenharia, UNESP - Univ. Estadual PaulistaInstituto de Quimica de Sao Carlos, Universidade de Sao PauloFaculdade de Engenharia, UNESP - Univ. Estadual PaulistaU.S. Department of Energy: DE-AC02-06CH11357Materials Science Division, Argonne National LaboratoryUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Ciapina, Eduardo G. [UNESP]Lopes, Pietro P.Subbaraman, RamTicianelli, Edson A.Stamenkovic, VojislavStrmcnik, DusanMarkovic, Nenad M.2018-12-11T16:39:00Z2018-12-11T16:39:00Z2015-08-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article30-33application/pdfhttp://dx.doi.org/10.1016/j.elecom.2015.07.020Electrochemistry Communications, v. 60, p. 30-33.1388-2481http://hdl.handle.net/11449/16795410.1016/j.elecom.2015.07.0202-s2.0-849388840652-s2.0-84938884065.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengElectrochemistry Communications1,606info:eu-repo/semantics/openAccess2023-11-05T06:08:31Zoai:repositorio.unesp.br:11449/167954Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:58:02.415019Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
title Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
spellingShingle Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
Ciapina, Eduardo G. [UNESP]
Catalyst selectivity
Electrocatalysis
Electrochemical interfaces
Electronic effects
Ensemble effects
Oxygen reduction reaction
title_short Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
title_full Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
title_fullStr Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
title_full_unstemmed Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
title_sort Surface spectators and their role in relationships between activity and selectivity of the oxygen reduction reaction in acid environments
author Ciapina, Eduardo G. [UNESP]
author_facet Ciapina, Eduardo G. [UNESP]
Lopes, Pietro P.
Subbaraman, Ram
Ticianelli, Edson A.
Stamenkovic, Vojislav
Strmcnik, Dusan
Markovic, Nenad M.
author_role author
author2 Lopes, Pietro P.
Subbaraman, Ram
Ticianelli, Edson A.
Stamenkovic, Vojislav
Strmcnik, Dusan
Markovic, Nenad M.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Materials Science Division, Argonne National Laboratory
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Ciapina, Eduardo G. [UNESP]
Lopes, Pietro P.
Subbaraman, Ram
Ticianelli, Edson A.
Stamenkovic, Vojislav
Strmcnik, Dusan
Markovic, Nenad M.
dc.subject.por.fl_str_mv Catalyst selectivity
Electrocatalysis
Electrochemical interfaces
Electronic effects
Ensemble effects
Oxygen reduction reaction
topic Catalyst selectivity
Electrocatalysis
Electrochemical interfaces
Electronic effects
Ensemble effects
Oxygen reduction reaction
description Abstract 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.
publishDate 2015
dc.date.none.fl_str_mv 2015-08-12
2018-12-11T16:39:00Z
2018-12-11T16:39:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.elecom.2015.07.020
Electrochemistry Communications, v. 60, p. 30-33.
1388-2481
http://hdl.handle.net/11449/167954
10.1016/j.elecom.2015.07.020
2-s2.0-84938884065
2-s2.0-84938884065.pdf
url http://dx.doi.org/10.1016/j.elecom.2015.07.020
http://hdl.handle.net/11449/167954
identifier_str_mv Electrochemistry Communications, v. 60, p. 30-33.
1388-2481
10.1016/j.elecom.2015.07.020
2-s2.0-84938884065
2-s2.0-84938884065.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Electrochemistry Communications
1,606
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 30-33
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128726891757568

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