A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.elecom.2018.07.023 http://hdl.handle.net/11449/171278 |
Resumo: | Operando assessment of electronic properties near the Fermi level is essential to gain new insights into the mechanisms of electrochemical reactions as well as for the development of more efficient electrocatalysts. However, the high vacuum ambient needed for X-ray absorption measurements at low energies has made studies under electrochemical conditions quite challenging. Here, we describe an out-of-chamber setup with a new electrochemical cell that allowed us to performed operando X-ray absorption studies at the low energy of the Pd L3 edge. Using the new electrochemical cell, we were able to probe, for the first time, the changes in electronic properties of carbon-supported Pd nanoparticles induced by the electrochemical oxidation of the Pd surface. Our results demonstrate that the oxidation process produces an increase in the Pd 4d band vacancy, which indicates that charge is transferred from the metal to the adsorbed oxygenated species. |
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Repositório Institucional da UNESP |
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spelling |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladiumElectrochemical cellElectronic propertiesOperando X-ray absorption spectroscopyPd electrocatalystOperando assessment of electronic properties near the Fermi level is essential to gain new insights into the mechanisms of electrochemical reactions as well as for the development of more efficient electrocatalysts. However, the high vacuum ambient needed for X-ray absorption measurements at low energies has made studies under electrochemical conditions quite challenging. Here, we describe an out-of-chamber setup with a new electrochemical cell that allowed us to performed operando X-ray absorption studies at the low energy of the Pd L3 edge. Using the new electrochemical cell, we were able to probe, for the first time, the changes in electronic properties of carbon-supported Pd nanoparticles induced by the electrochemical oxidation of the Pd surface. Our results demonstrate that the oxidation process produces an increase in the Pd 4d band vacancy, which indicates that charge is transferred from the metal to the adsorbed oxygenated species.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)São Paulo State University (UNESP) Institute of ChemistryBrazilian Synchrotron Light Laboratory (LNLS) Brazilian Center for Research in Energy and Materials (CNPEM)São Paulo State University (UNESP) Institute of ChemistryFAPESP: 2014/12255-6FAPESP: 2016/05041-5CNPq: 407143/2013-0Universidade Estadual Paulista (Unesp)Brazilian Center for Research in Energy and Materials (CNPEM)Villullas, Hebe M. [UNESP]Ometto, Felipe B. [UNESP]Alvarenga, Gabriel M. [UNESP]Vicentin, Flávio C.2018-12-11T16:54:42Z2018-12-11T16:54:42Z2018-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article14-17application/pdfhttp://dx.doi.org/10.1016/j.elecom.2018.07.023Electrochemistry Communications, v. 94, p. 14-17.1388-2481http://hdl.handle.net/11449/17127810.1016/j.elecom.2018.07.0232-s2.0-850506420272-s2.0-85050642027.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengElectrochemistry Communications1,606info:eu-repo/semantics/openAccess2023-12-05T06:20:39Zoai:repositorio.unesp.br:11449/171278Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:34:14.452320Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
title |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
spellingShingle |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium Villullas, Hebe M. [UNESP] Electrochemical cell Electronic properties Operando X-ray absorption spectroscopy Pd electrocatalyst |
title_short |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
title_full |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
title_fullStr |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
title_full_unstemmed |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
title_sort |
A novel electrochemical cell for operando X-ray absorption measurements at low energies: Probing electrochemically induced electronic changes in palladium |
author |
Villullas, Hebe M. [UNESP] |
author_facet |
Villullas, Hebe M. [UNESP] Ometto, Felipe B. [UNESP] Alvarenga, Gabriel M. [UNESP] Vicentin, Flávio C. |
author_role |
author |
author2 |
Ometto, Felipe B. [UNESP] Alvarenga, Gabriel M. [UNESP] Vicentin, Flávio C. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Brazilian Center for Research in Energy and Materials (CNPEM) |
dc.contributor.author.fl_str_mv |
Villullas, Hebe M. [UNESP] Ometto, Felipe B. [UNESP] Alvarenga, Gabriel M. [UNESP] Vicentin, Flávio C. |
dc.subject.por.fl_str_mv |
Electrochemical cell Electronic properties Operando X-ray absorption spectroscopy Pd electrocatalyst |
topic |
Electrochemical cell Electronic properties Operando X-ray absorption spectroscopy Pd electrocatalyst |
description |
Operando assessment of electronic properties near the Fermi level is essential to gain new insights into the mechanisms of electrochemical reactions as well as for the development of more efficient electrocatalysts. However, the high vacuum ambient needed for X-ray absorption measurements at low energies has made studies under electrochemical conditions quite challenging. Here, we describe an out-of-chamber setup with a new electrochemical cell that allowed us to performed operando X-ray absorption studies at the low energy of the Pd L3 edge. Using the new electrochemical cell, we were able to probe, for the first time, the changes in electronic properties of carbon-supported Pd nanoparticles induced by the electrochemical oxidation of the Pd surface. Our results demonstrate that the oxidation process produces an increase in the Pd 4d band vacancy, which indicates that charge is transferred from the metal to the adsorbed oxygenated species. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:54:42Z 2018-12-11T16:54:42Z 2018-09-01 |
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.2018.07.023 Electrochemistry Communications, v. 94, p. 14-17. 1388-2481 http://hdl.handle.net/11449/171278 10.1016/j.elecom.2018.07.023 2-s2.0-85050642027 2-s2.0-85050642027.pdf |
url |
http://dx.doi.org/10.1016/j.elecom.2018.07.023 http://hdl.handle.net/11449/171278 |
identifier_str_mv |
Electrochemistry Communications, v. 94, p. 14-17. 1388-2481 10.1016/j.elecom.2018.07.023 2-s2.0-85050642027 2-s2.0-85050642027.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 |
14-17 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_ |
1808129088113606656 |