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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...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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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. |
format | Online Article Text |
id | pubmed-8748757 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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