Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides

Sustainable electrocatalysis of the oxygen evolution reaction (OER) constitutes a major challenge for the realization of green fuels. Oxides based on Ni and Fe in alkaline media have been proposed to avoid using critical raw materials. However, their ill-defined structures under OER conditions make...

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Authors: Garcés-Pineda, Felipe A.|||0000-0001-5759-9980, Nguyën, Huu Chuong|||0000-0002-2307-4921, Blasco-Ahicart, Marta, García-Tecedor, Miguel|||0000-0002-9664-4665, de Fez Febré, Mabel|||0000-0002-7533-1088, Tang, PengYi|||0000-0002-2306-095X, Arbiol i Cobos, Jordi|||0000-0002-0695-1726, Giménez, Sixto|||0000-0002-4522-3174, Galán-Mascarós, José Ramón|||0000-0001-7983-9762, López, Núria|||0000-0001-9150-5941
Format: article
Publication Date:2021
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:271948
Online Access:https://ddd.uab.cat/record/271948
https://dx.doi.org/urn:doi:10.1002/cssc.202002782
Access Level:Open access
Keyword:Mixed metal oxides
Spinels
Oxygen vacancy
Water splitting
Descriptors
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spelling Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxidesGarcés-Pineda, Felipe A.|||0000-0001-5759-9980Nguyën, Huu Chuong|||0000-0002-2307-4921Blasco-Ahicart, MartaGarcía-Tecedor, Miguel|||0000-0002-9664-4665de Fez Febré, Mabel|||0000-0002-7533-1088Tang, PengYi|||0000-0002-2306-095XArbiol i Cobos, Jordi|||0000-0002-0695-1726Giménez, Sixto|||0000-0002-4522-3174Galán-Mascarós, José Ramón|||0000-0001-7983-9762López, Núria|||0000-0001-9150-5941Mixed metal oxidesSpinelsOxygen vacancyWater splittingDescriptorsSustainable electrocatalysis of the oxygen evolution reaction (OER) constitutes a major challenge for the realization of green fuels. Oxides based on Ni and Fe in alkaline media have been proposed to avoid using critical raw materials. However, their ill-defined structures under OER conditions make the identification of key descriptors difficult. Here, we have studied Fe-Ni-Zn spinel oxides, with a well-defined crystal structure, as a platform to obtain general understanding on the key contributions. The OER reaches maximum performance when: (i) Zn is present in the Spinel structure, (ii) very dense, equimolar 1 : 1 : 1 stoichiometry sites appear on the surface as they allow the formation of oxygen vacancies where Zn favors pushing the electronic density that is pulled by the octahedral Fe and tetrahedral Ni redox pair lowering the overpotential. Our work proves cooperative electronic effects on surface active sites as key to design optimum OER electrocatalysts. 22021-01-0120212021-01-01Articlehttp://purl.org/coar/resource_type/c_6501SMURhttp://purl.org/coar/version/c_71e4c1898caa6e32info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/271948https://dx.doi.org/urn:doi:10.1002/cssc.202002782reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 732840Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2017-0706Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 ENE2017-85087-C3Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-327open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2719482026-06-06T12:50:31Z
dc.title.none.fl_str_mv Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
title Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
spellingShingle Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
Garcés-Pineda, Felipe A.|||0000-0001-5759-9980
Mixed metal oxides
Spinels
Oxygen vacancy
Water splitting
Descriptors
title_short Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
title_full Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
title_fullStr Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
title_full_unstemmed Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
title_sort Push-pull electronic effects in surface-active sites enhance electrocatalytic oxygen evolution on transition metal oxides
dc.creator.none.fl_str_mv Garcés-Pineda, Felipe A.|||0000-0001-5759-9980
Nguyën, Huu Chuong|||0000-0002-2307-4921
Blasco-Ahicart, Marta
García-Tecedor, Miguel|||0000-0002-9664-4665
de Fez Febré, Mabel|||0000-0002-7533-1088
Tang, PengYi|||0000-0002-2306-095X
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
Giménez, Sixto|||0000-0002-4522-3174
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
López, Núria|||0000-0001-9150-5941
author Garcés-Pineda, Felipe A.|||0000-0001-5759-9980
author_facet Garcés-Pineda, Felipe A.|||0000-0001-5759-9980
Nguyën, Huu Chuong|||0000-0002-2307-4921
Blasco-Ahicart, Marta
García-Tecedor, Miguel|||0000-0002-9664-4665
de Fez Febré, Mabel|||0000-0002-7533-1088
Tang, PengYi|||0000-0002-2306-095X
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
Giménez, Sixto|||0000-0002-4522-3174
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
López, Núria|||0000-0001-9150-5941
author_role author
author2 Nguyën, Huu Chuong|||0000-0002-2307-4921
Blasco-Ahicart, Marta
García-Tecedor, Miguel|||0000-0002-9664-4665
de Fez Febré, Mabel|||0000-0002-7533-1088
Tang, PengYi|||0000-0002-2306-095X
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
Giménez, Sixto|||0000-0002-4522-3174
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
López, Núria|||0000-0001-9150-5941
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Mixed metal oxides
Spinels
Oxygen vacancy
Water splitting
Descriptors
topic Mixed metal oxides
Spinels
Oxygen vacancy
Water splitting
Descriptors
description Sustainable electrocatalysis of the oxygen evolution reaction (OER) constitutes a major challenge for the realization of green fuels. Oxides based on Ni and Fe in alkaline media have been proposed to avoid using critical raw materials. However, their ill-defined structures under OER conditions make the identification of key descriptors difficult. Here, we have studied Fe-Ni-Zn spinel oxides, with a well-defined crystal structure, as a platform to obtain general understanding on the key contributions. The OER reaches maximum performance when: (i) Zn is present in the Spinel structure, (ii) very dense, equimolar 1 : 1 : 1 stoichiometry sites appear on the surface as they allow the formation of oxygen vacancies where Zn favors pushing the electronic density that is pulled by the octahedral Fe and tetrahedral Ni redox pair lowering the overpotential. Our work proves cooperative electronic effects on surface active sites as key to design optimum OER electrocatalysts.
publishDate 2021
dc.date.none.fl_str_mv 2
2021-01-01
2021
2021-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
SMUR
http://purl.org/coar/version/c_71e4c1898caa6e32
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/271948
https://dx.doi.org/urn:doi:10.1002/cssc.202002782
url https://ddd.uab.cat/record/271948
https://dx.doi.org/urn:doi:10.1002/cssc.202002782
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 732840
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2017-0706
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 ENE2017-85087-C3
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-327
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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