Insights into Palladium Deactivation during Advanced Oxidation Processes

[EN]A key step in creating efficient and long-lasting catalysts is understanding their deactivation mechanism(s). On this basis, the behavior of a series of Pd/corundum materials during several hydrogen adsorption/desorption cycles was studied using temperature-programmed desorption coupled with mas...

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Authors: Pinos-Vélez, Verónica, Osegueda, Oscar, Crivoi, Dana Georgiana, Llorca, Jordi, García-García, F. Javier, Álvarez, Mayra G., Medina, Francesc, Dafinov, Anton
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Universidad de Salamanca (USAL)
Repository:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/154842
Online Access:http://hdl.handle.net/10366/154842
Access Level:Open access
Keyword:palladium
single atom
hydrogen
deactivation mechanism
nanoparticles
advanced oxidation processes
2303 Química Inorgánica
id ES_2cc6fcd8b67dcbf4858ed0006947ecf1
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network_acronym_str ES
network_name_str España
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spelling Insights into Palladium Deactivation during Advanced Oxidation ProcessesPinos-Vélez, VerónicaOsegueda, OscarCrivoi, Dana GeorgianaLlorca, JordiGarcía-García, F. JavierÁlvarez, Mayra G.Medina, FrancescDafinov, Antonpalladiumsingle atomhydrogendeactivation mechanismnanoparticlesadvanced oxidation processes2303 Química Inorgánica[EN]A key step in creating efficient and long-lasting catalysts is understanding their deactivation mechanism(s). On this basis, the behavior of a series of Pd/corundum materials during several hydrogen adsorption/desorption cycles was studied using temperature-programmed desorption coupled with mass spectrometry and aberration-corrected transmission electron microscopy. The materials, prepared by impregnation and by sputtering, presented uniform well-dispersed Pd nanoparticles. In addition, single atoms and small clusters of Pd were only detected in the materials prepared by impregnation. Upon exposure to hydrogen, the Pd nanoparticles smaller than 2 nm and the single atoms did not present any change, while the larger ones presented a core–shell morphology, where the core was Pd and the shell was PdHx. The results suggest that the long-term activity of the materials prepared by impregnation can be attributed solely to the presence of small clusters and single atoms of Pd.202420242022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10366/154842reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésPID2021-124572OBC31Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1548422026-06-07T06:28:51Z
dc.title.none.fl_str_mv Insights into Palladium Deactivation during Advanced Oxidation Processes
title Insights into Palladium Deactivation during Advanced Oxidation Processes
spellingShingle Insights into Palladium Deactivation during Advanced Oxidation Processes
Pinos-Vélez, Verónica
palladium
single atom
hydrogen
deactivation mechanism
nanoparticles
advanced oxidation processes
2303 Química Inorgánica
title_short Insights into Palladium Deactivation during Advanced Oxidation Processes
title_full Insights into Palladium Deactivation during Advanced Oxidation Processes
title_fullStr Insights into Palladium Deactivation during Advanced Oxidation Processes
title_full_unstemmed Insights into Palladium Deactivation during Advanced Oxidation Processes
title_sort Insights into Palladium Deactivation during Advanced Oxidation Processes
dc.creator.none.fl_str_mv Pinos-Vélez, Verónica
Osegueda, Oscar
Crivoi, Dana Georgiana
Llorca, Jordi
García-García, F. Javier
Álvarez, Mayra G.
Medina, Francesc
Dafinov, Anton
author Pinos-Vélez, Verónica
author_facet Pinos-Vélez, Verónica
Osegueda, Oscar
Crivoi, Dana Georgiana
Llorca, Jordi
García-García, F. Javier
Álvarez, Mayra G.
Medina, Francesc
Dafinov, Anton
author_role author
author2 Osegueda, Oscar
Crivoi, Dana Georgiana
Llorca, Jordi
García-García, F. Javier
Álvarez, Mayra G.
Medina, Francesc
Dafinov, Anton
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv palladium
single atom
hydrogen
deactivation mechanism
nanoparticles
advanced oxidation processes
2303 Química Inorgánica
topic palladium
single atom
hydrogen
deactivation mechanism
nanoparticles
advanced oxidation processes
2303 Química Inorgánica
description [EN]A key step in creating efficient and long-lasting catalysts is understanding their deactivation mechanism(s). On this basis, the behavior of a series of Pd/corundum materials during several hydrogen adsorption/desorption cycles was studied using temperature-programmed desorption coupled with mass spectrometry and aberration-corrected transmission electron microscopy. The materials, prepared by impregnation and by sputtering, presented uniform well-dispersed Pd nanoparticles. In addition, single atoms and small clusters of Pd were only detected in the materials prepared by impregnation. Upon exposure to hydrogen, the Pd nanoparticles smaller than 2 nm and the single atoms did not present any change, while the larger ones presented a core–shell morphology, where the core was Pd and the shell was PdHx. The results suggest that the long-term activity of the materials prepared by impregnation can be attributed solely to the presence of small clusters and single atoms of Pd.
publishDate 2022
dc.date.none.fl_str_mv 2022
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/154842
url http://hdl.handle.net/10366/154842
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv PID2021-124572OBC31
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405264303620097
score 15,301603

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