Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni

Proton exchange membrane (PEM) electrolysers are promising devices to produce hydrogen as a green fuel. Currently, this technology is limited by the sluggish kinetics of the oxygen evolution reaction (OER). In this work, we describe an environmentally safe method for the preparation of Ir oxide thin...

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Authors: Bech Holde, Freja, Sebastian-Pascual, Paula, Nicole Dalby, Kim, Gómez, Elvira, Escudero-Escribano, María
Format: article
Status:Published version
Publication Date:2023
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/206677
Online Access:https://hdl.handle.net/2445/206677
Access Level:Open access
Keyword:Oxigen
Nanoestructures
Iridi
Oxygen
Nanostructures
Iridium
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spelling Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and NiBech Holde, FrejaSebastian-Pascual, PaulaNicole Dalby, KimGómez, ElviraEscudero-Escribano, MaríaOxigenNanoestructuresIridiOxygenNanostructuresIridiumProton exchange membrane (PEM) electrolysers are promising devices to produce hydrogen as a green fuel. Currently, this technology is limited by the sluggish kinetics of the oxygen evolution reaction (OER). In this work, we describe an environmentally safe method for the preparation of Ir oxide thin films (IrO2) for OER. Electrodeposition of Co and Ni was performed in the non-toxic choline chloride:urea deep eutectic solvent (ChCl:urea DES), followed by galvanic displacement reaction (GDR) of Co and Ni by Ir(IV). We evaluated how the GDR conditions, such as the metal replaced (Co or Ni), time and temperature affect both the activity and stability of the deposited IrO2 films on gold substrates. We observed that GDR of Ni at 90 ◦C induces morphological changes on the IrO2 nanostructures which resulted in higher activity and stability towards OER. We highlight that not only reducing mass loadings of Ir but also tuning the surface morphology and structure controlling the synthesis preparation, as well as investigating the role of the substrate, are key to design more active and stable OER electrocatalysts.Elsevier Ltd2024202420232024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion12 p.application/pdfhttps://hdl.handle.net/2445/206677Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.electacta.2023.143058Electrochimica Acta, 2023, vol. 467, p. 1-12https://doi.org/10.1016/j.electacta.2023.143058cc-by-nc-nd (c) Bech Holde, Freja et al., 2023http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2066772026-05-29T05:05:01Z
dc.title.none.fl_str_mv Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
title Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
spellingShingle Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
Bech Holde, Freja
Oxigen
Nanoestructures
Iridi
Oxygen
Nanostructures
Iridium
title_short Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
title_full Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
title_fullStr Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
title_full_unstemmed Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
title_sort Nanostructured Ir-based electrocatalysts for oxygen evolution prepared by galvanic displacement of Co and Ni
dc.creator.none.fl_str_mv Bech Holde, Freja
Sebastian-Pascual, Paula
Nicole Dalby, Kim
Gómez, Elvira
Escudero-Escribano, María
author Bech Holde, Freja
author_facet Bech Holde, Freja
Sebastian-Pascual, Paula
Nicole Dalby, Kim
Gómez, Elvira
Escudero-Escribano, María
author_role author
author2 Sebastian-Pascual, Paula
Nicole Dalby, Kim
Gómez, Elvira
Escudero-Escribano, María
author2_role author
author
author
author
dc.subject.none.fl_str_mv Oxigen
Nanoestructures
Iridi
Oxygen
Nanostructures
Iridium
topic Oxigen
Nanoestructures
Iridi
Oxygen
Nanostructures
Iridium
description Proton exchange membrane (PEM) electrolysers are promising devices to produce hydrogen as a green fuel. Currently, this technology is limited by the sluggish kinetics of the oxygen evolution reaction (OER). In this work, we describe an environmentally safe method for the preparation of Ir oxide thin films (IrO2) for OER. Electrodeposition of Co and Ni was performed in the non-toxic choline chloride:urea deep eutectic solvent (ChCl:urea DES), followed by galvanic displacement reaction (GDR) of Co and Ni by Ir(IV). We evaluated how the GDR conditions, such as the metal replaced (Co or Ni), time and temperature affect both the activity and stability of the deposited IrO2 films on gold substrates. We observed that GDR of Ni at 90 ◦C induces morphological changes on the IrO2 nanostructures which resulted in higher activity and stability towards OER. We highlight that not only reducing mass loadings of Ir but also tuning the surface morphology and structure controlling the synthesis preparation, as well as investigating the role of the substrate, are key to design more active and stable OER electrocatalysts.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
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 https://hdl.handle.net/2445/206677
url https://hdl.handle.net/2445/206677
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.electacta.2023.143058
Electrochimica Acta, 2023, vol. 467, p. 1-12
https://doi.org/10.1016/j.electacta.2023.143058
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Bech Holde, Freja et al., 2023
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Bech Holde, Freja et al., 2023
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 12 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier Ltd
publisher.none.fl_str_mv Elsevier Ltd
dc.source.none.fl_str_mv Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869410786824159232
score 15,198674

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