dc.contributor.author |
Garcés-Pineda, Felipe Andrés |
dc.contributor.author |
Nguyën, Huu Chuong |
dc.contributor.author |
Blasco-Ahicart, Marta |
dc.contributor.author |
García-Tecedor, Miguel |
dc.contributor.author |
de Fez-Febré, Mabel |
dc.contributor.author |
Tang, Peng-Yi |
dc.contributor.author |
Arbiol, Jordi |
dc.contributor.author |
Giménez, Sixto |
dc.contributor.author |
Galán-Mascarós, José Ramón |
dc.contributor.author |
López, Núria |
dc.date.accessioned |
2021-08-24T10:07:16Z |
dc.date.available |
2021-08-24T10:07:16Z |
dc.date.issued |
2020-01-29 |
dc.identifier.uri |
http://hdl.handle.net/2072/450546 |
dc.format.extent |
1595 p. |
dc.language.iso |
eng |
dc.rights |
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.source |
RECERCAT (Dipòsit de la Recerca de Catalunya) |
dc.subject.other |
54 |
dc.title |
Push-Pull Electronic Effects in Surface-Active Sites Enhance Electrocatalytic Oxygen Evolution on Transition Metal Oxides |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/acceptedVersion |
dc.embargo.terms |
12 mesos |
dc.relation.projectID |
European Union. Grant Number: 732840 |
dc.relation.projectID |
QCM-2018-3-0012 |
dc.relation.projectID |
2017 SGR 327 |
dc.relation.projectID |
ENE2017-85087-C3 |
dc.relation.projectID |
SEV-2017-0706 |
dc.identifier.doi |
doi.org/10.1002/cssc.202002782 |
dc.rights.accessLevel |
info:eu-repo/semantics/openAccess |
dc.description.abstract |
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. |