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3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction

The three-dimensional (3D) distribution of individual atoms on the surface of catalyst nanoparticles plays a vital role in their activity and stability. Optimising the performance of electrocatalysts requires atomic-scale information, but it is difficult to obtain. Here, we use atom probe tomography...

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Autores principales: Xiang, Weikai, Yang, Nating, Li, Xiaopeng, Linnemann, Julia, Hagemann, Ulrich, Ruediger, Olaf, Heidelmann, Markus, Falk, Tobias, Aramini, Matteo, DeBeer, Serena, Muhler, Martin, Tschulik, Kristina, Li, Tong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8748757/
https://www.ncbi.nlm.nih.gov/pubmed/35013310
http://dx.doi.org/10.1038/s41467-021-27788-2
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author Xiang, Weikai
Yang, Nating
Li, Xiaopeng
Linnemann, Julia
Hagemann, Ulrich
Ruediger, Olaf
Heidelmann, Markus
Falk, Tobias
Aramini, Matteo
DeBeer, Serena
Muhler, Martin
Tschulik, Kristina
Li, Tong
author_facet Xiang, Weikai
Yang, Nating
Li, Xiaopeng
Linnemann, Julia
Hagemann, Ulrich
Ruediger, Olaf
Heidelmann, Markus
Falk, Tobias
Aramini, Matteo
DeBeer, Serena
Muhler, Martin
Tschulik, Kristina
Li, Tong
author_sort Xiang, Weikai
collection PubMed
description The three-dimensional (3D) distribution of individual atoms on the surface of catalyst nanoparticles plays a vital role in their activity and stability. Optimising the performance of electrocatalysts requires atomic-scale information, but it is difficult to obtain. Here, we use atom probe tomography to elucidate the 3D structure of 10 nm sized Co(2)FeO(4) and CoFe(2)O(4) nanoparticles during oxygen evolution reaction (OER). We reveal nanoscale spinodal decomposition in pristine Co(2)FeO(4). The interfaces of Co-rich and Fe-rich nanodomains of Co(2)FeO(4) become trapping sites for hydroxyl groups, contributing to a higher OER activity compared to that of CoFe(2)O(4). However, the activity of Co(2)FeO(4) drops considerably due to concurrent irreversible transformation towards Co(IV)O(2) and pronounced Fe dissolution. In contrast, there is negligible elemental redistribution for CoFe(2)O(4) after OER, except for surface structural transformation towards (Fe(III), Co(III))(2)O(3). Overall, our study provides a unique 3D compositional distribution of mixed Co-Fe spinel oxides, which gives atomic-scale insights into active sites and the deactivation of electrocatalysts during OER.
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spelling pubmed-87487572022-01-20 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction Xiang, Weikai Yang, Nating Li, Xiaopeng Linnemann, Julia Hagemann, Ulrich Ruediger, Olaf Heidelmann, Markus Falk, Tobias Aramini, Matteo DeBeer, Serena Muhler, Martin Tschulik, Kristina Li, Tong Nat Commun Article The three-dimensional (3D) distribution of individual atoms on the surface of catalyst nanoparticles plays a vital role in their activity and stability. Optimising the performance of electrocatalysts requires atomic-scale information, but it is difficult to obtain. Here, we use atom probe tomography to elucidate the 3D structure of 10 nm sized Co(2)FeO(4) and CoFe(2)O(4) nanoparticles during oxygen evolution reaction (OER). We reveal nanoscale spinodal decomposition in pristine Co(2)FeO(4). The interfaces of Co-rich and Fe-rich nanodomains of Co(2)FeO(4) become trapping sites for hydroxyl groups, contributing to a higher OER activity compared to that of CoFe(2)O(4). However, the activity of Co(2)FeO(4) drops considerably due to concurrent irreversible transformation towards Co(IV)O(2) and pronounced Fe dissolution. In contrast, there is negligible elemental redistribution for CoFe(2)O(4) after OER, except for surface structural transformation towards (Fe(III), Co(III))(2)O(3). Overall, our study provides a unique 3D compositional distribution of mixed Co-Fe spinel oxides, which gives atomic-scale insights into active sites and the deactivation of electrocatalysts during OER. Nature Publishing Group UK 2022-01-10 /pmc/articles/PMC8748757/ /pubmed/35013310 http://dx.doi.org/10.1038/s41467-021-27788-2 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Xiang, Weikai
Yang, Nating
Li, Xiaopeng
Linnemann, Julia
Hagemann, Ulrich
Ruediger, Olaf
Heidelmann, Markus
Falk, Tobias
Aramini, Matteo
DeBeer, Serena
Muhler, Martin
Tschulik, Kristina
Li, Tong
3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title_full 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title_fullStr 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title_full_unstemmed 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title_short 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
title_sort 3d atomic-scale imaging of mixed co-fe spinel oxide nanoparticles during oxygen evolution reaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8748757/
https://www.ncbi.nlm.nih.gov/pubmed/35013310
http://dx.doi.org/10.1038/s41467-021-27788-2
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