Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions

Detalhes bibliográficos
Autor(a) principal: Castegnaro, Marcus Vinicíus
Data de Publicação: 2021
Outros Autores: Gorgeski, Andreia, Alves, Maria do Carmo Martins, Morais, Jonder
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/236841
Resumo: The present study has tracked the changes in the electronic and structural properties of Pd–Cu nanoalloys that were influenced by the composition and chosen support. Carbon supported Pd–Cu nanoalloys (PdxCu1−x/C for x = 1, 0.7, 0.5, 0.3 and 0) were subjected to sequential thermal treatments (up to 450 °C) to induce reduction and oxidation reactions. Valence band photoemission data and in situ XAS results showed that stronger oxygen–metal bonds are formed in Cu-richer samples. A regeneration process assisted by the support was observed during the oxidation reaction, and its reduction efficiency was found to be dependent on the distribution of occupied electronic states near the Fermi level.
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spelling Castegnaro, Marcus VinicíusGorgeski, AndreiaAlves, Maria do Carmo MartinsMorais, Jonder2022-04-07T04:49:51Z20212516-0230http://hdl.handle.net/10183/236841001137446The present study has tracked the changes in the electronic and structural properties of Pd–Cu nanoalloys that were influenced by the composition and chosen support. Carbon supported Pd–Cu nanoalloys (PdxCu1−x/C for x = 1, 0.7, 0.5, 0.3 and 0) were subjected to sequential thermal treatments (up to 450 °C) to induce reduction and oxidation reactions. Valence band photoemission data and in situ XAS results showed that stronger oxygen–metal bonds are formed in Cu-richer samples. A regeneration process assisted by the support was observed during the oxidation reaction, and its reduction efficiency was found to be dependent on the distribution of occupied electronic states near the Fermi level.application/pdfengNanoscale advances. London. Vol. 3, no. 21 (Nov. 2021), p. 6138-6143Ligas de paládio-cobreOxidaçãoReducaoEspectroscopia de absorção de raios-xCarbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactionsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001137446.pdf.txt001137446.pdf.txtExtracted Texttext/plain24911http://www.lume.ufrgs.br/bitstream/10183/236841/2/001137446.pdf.txt111c828c413eeb7132bb78ca18b27337MD52ORIGINAL001137446.pdfTexto completo (inglês)application/pdf903513http://www.lume.ufrgs.br/bitstream/10183/236841/1/001137446.pdfc22874c06fe8cb975eb95e9eb8e43e48MD5110183/2368412023-08-11 03:54:51.050853oai:www.lume.ufrgs.br:10183/236841Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-11T06:54:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
title Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
spellingShingle Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
Castegnaro, Marcus Vinicíus
Ligas de paládio-cobre
Oxidação
Reducao
Espectroscopia de absorção de raios-x
title_short Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
title_full Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
title_fullStr Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
title_full_unstemmed Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
title_sort Carbon supported Pd–Cu nanoalloys : support and valence band structure influence on reduction and oxidation reactions
author Castegnaro, Marcus Vinicíus
author_facet Castegnaro, Marcus Vinicíus
Gorgeski, Andreia
Alves, Maria do Carmo Martins
Morais, Jonder
author_role author
author2 Gorgeski, Andreia
Alves, Maria do Carmo Martins
Morais, Jonder
author2_role author
author
author
dc.contributor.author.fl_str_mv Castegnaro, Marcus Vinicíus
Gorgeski, Andreia
Alves, Maria do Carmo Martins
Morais, Jonder
dc.subject.por.fl_str_mv Ligas de paládio-cobre
Oxidação
Reducao
Espectroscopia de absorção de raios-x
topic Ligas de paládio-cobre
Oxidação
Reducao
Espectroscopia de absorção de raios-x
description The present study has tracked the changes in the electronic and structural properties of Pd–Cu nanoalloys that were influenced by the composition and chosen support. Carbon supported Pd–Cu nanoalloys (PdxCu1−x/C for x = 1, 0.7, 0.5, 0.3 and 0) were subjected to sequential thermal treatments (up to 450 °C) to induce reduction and oxidation reactions. Valence band photoemission data and in situ XAS results showed that stronger oxygen–metal bonds are formed in Cu-richer samples. A regeneration process assisted by the support was observed during the oxidation reaction, and its reduction efficiency was found to be dependent on the distribution of occupied electronic states near the Fermi level.
publishDate 2021
dc.date.issued.fl_str_mv 2021
dc.date.accessioned.fl_str_mv 2022-04-07T04:49:51Z
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/236841
dc.identifier.issn.pt_BR.fl_str_mv 2516-0230
dc.identifier.nrb.pt_BR.fl_str_mv 001137446
identifier_str_mv 2516-0230
001137446
url http://hdl.handle.net/10183/236841
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Nanoscale advances. London. Vol. 3, no. 21 (Nov. 2021), p. 6138-6143
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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