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The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting
[Image: see text] Restructuring is an important yet less understood phenomenon in the catalysis community. Recent studies have shown that a group of transition metal sulfide catalysts can completely or partially restructure during electrochemical reactions which then exhibit high activity even bette...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8715481/ https://www.ncbi.nlm.nih.gov/pubmed/34977893 http://dx.doi.org/10.1021/jacsau.1c00346 |
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author | Wang, Maoyu Wa, Qingbo Bai, Xiaowan He, Zuyun Samarakoon, Widitha S. Ma, Qing Du, Yingge Chen, Yan Zhou, Hua Liu, Yuanyue Wang, Xinwei Feng, Zhenxing |
author_facet | Wang, Maoyu Wa, Qingbo Bai, Xiaowan He, Zuyun Samarakoon, Widitha S. Ma, Qing Du, Yingge Chen, Yan Zhou, Hua Liu, Yuanyue Wang, Xinwei Feng, Zhenxing |
author_sort | Wang, Maoyu |
collection | PubMed |
description | [Image: see text] Restructuring is an important yet less understood phenomenon in the catalysis community. Recent studies have shown that a group of transition metal sulfide catalysts can completely or partially restructure during electrochemical reactions which then exhibit high activity even better than the best commercial standards. However, such restructuring processes and the final structures of the new catalysts are elusive, mainly due to the difficulty from the reaction-induced changes that cannot be captured by ex situ characterizations. To establish the true structure–property relationship in these in situ generated catalysts, we use multimodel operando characterizations including Raman spectroscopy, X-ray absorption spectroscopy, and X-ray reflectivity to investigate the restructuring of a representative catalyst, Co(9)S(8), that shows better activity compared to the commercial standard RuO(2) during the oxygen evolution reaction (OER), a key half reaction in water-splitting for hydrogen generation. We find that Co(9)S(8) ultimately converts to oxide cluster (CoO(x)) containing six oxygen coordinated Co octahedra as the basic unit which is the true catalytic center to promote high OER activity. The density functional theory calculations verify the in situ generated CoO(x) consisting of edge-sharing CoO(6) octahedral clusters as the actual active sites. Our results also provide insights to design other transition-metal-based materials as efficient electrocatalysts that experience a similar restructuring in OER. |
format | Online Article Text |
id | pubmed-8715481 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-87154812021-12-30 The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting Wang, Maoyu Wa, Qingbo Bai, Xiaowan He, Zuyun Samarakoon, Widitha S. Ma, Qing Du, Yingge Chen, Yan Zhou, Hua Liu, Yuanyue Wang, Xinwei Feng, Zhenxing JACS Au [Image: see text] Restructuring is an important yet less understood phenomenon in the catalysis community. Recent studies have shown that a group of transition metal sulfide catalysts can completely or partially restructure during electrochemical reactions which then exhibit high activity even better than the best commercial standards. However, such restructuring processes and the final structures of the new catalysts are elusive, mainly due to the difficulty from the reaction-induced changes that cannot be captured by ex situ characterizations. To establish the true structure–property relationship in these in situ generated catalysts, we use multimodel operando characterizations including Raman spectroscopy, X-ray absorption spectroscopy, and X-ray reflectivity to investigate the restructuring of a representative catalyst, Co(9)S(8), that shows better activity compared to the commercial standard RuO(2) during the oxygen evolution reaction (OER), a key half reaction in water-splitting for hydrogen generation. We find that Co(9)S(8) ultimately converts to oxide cluster (CoO(x)) containing six oxygen coordinated Co octahedra as the basic unit which is the true catalytic center to promote high OER activity. The density functional theory calculations verify the in situ generated CoO(x) consisting of edge-sharing CoO(6) octahedral clusters as the actual active sites. Our results also provide insights to design other transition-metal-based materials as efficient electrocatalysts that experience a similar restructuring in OER. American Chemical Society 2021-11-02 /pmc/articles/PMC8715481/ /pubmed/34977893 http://dx.doi.org/10.1021/jacsau.1c00346 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Wang, Maoyu Wa, Qingbo Bai, Xiaowan He, Zuyun Samarakoon, Widitha S. Ma, Qing Du, Yingge Chen, Yan Zhou, Hua Liu, Yuanyue Wang, Xinwei Feng, Zhenxing The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title | The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title_full | The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title_fullStr | The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title_full_unstemmed | The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title_short | The Restructuring-Induced CoO(x) Catalyst for Electrochemical Water Splitting |
title_sort | restructuring-induced coo(x) catalyst for electrochemical water splitting |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8715481/ https://www.ncbi.nlm.nih.gov/pubmed/34977893 http://dx.doi.org/10.1021/jacsau.1c00346 |
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