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

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 (Pd(x)Cu(1−x)/C for x = 1, 0.7, 0.5, 0.3 and 0) were subjected to sequential thermal treatments (up...

Descripción completa

Detalles Bibliográficos
Autores principales: Castegnaro, Marcus V., Gorgeski, Andreia, Alves, Maria C. M., Morais, Jonder
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2021
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417155/
https://www.ncbi.nlm.nih.gov/pubmed/36133948
http://dx.doi.org/10.1039/d1na00537e
_version_ 1784776647951515648
author Castegnaro, Marcus V.
Gorgeski, Andreia
Alves, Maria C. M.
Morais, Jonder
author_facet Castegnaro, Marcus V.
Gorgeski, Andreia
Alves, Maria C. M.
Morais, Jonder
author_sort Castegnaro, Marcus V.
collection PubMed
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 (Pd(x)Cu(1−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.
format Online
Article
Text
id pubmed-9417155
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher RSC
record_format MEDLINE/PubMed
spelling pubmed-94171552022-09-20 Carbon supported Pd–Cu nanoalloys: support and valence band structure influence on reduction and oxidation reactions Castegnaro, Marcus V. Gorgeski, Andreia Alves, Maria C. M. Morais, Jonder Nanoscale Adv Chemistry 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 (Pd(x)Cu(1−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. RSC 2021-08-26 /pmc/articles/PMC9417155/ /pubmed/36133948 http://dx.doi.org/10.1039/d1na00537e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Castegnaro, Marcus V.
Gorgeski, Andreia
Alves, Maria C. M.
Morais, Jonder
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
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_short 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
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417155/
https://www.ncbi.nlm.nih.gov/pubmed/36133948
http://dx.doi.org/10.1039/d1na00537e
work_keys_str_mv AT castegnaromarcusv carbonsupportedpdcunanoalloyssupportandvalencebandstructureinfluenceonreductionandoxidationreactions
AT gorgeskiandreia carbonsupportedpdcunanoalloyssupportandvalencebandstructureinfluenceonreductionandoxidationreactions
AT alvesmariacm carbonsupportedpdcunanoalloyssupportandvalencebandstructureinfluenceonreductionandoxidationreactions
AT moraisjonder carbonsupportedpdcunanoalloyssupportandvalencebandstructureinfluenceonreductionandoxidationreactions

Ejemplares similares