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A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water
The O(2)/H(2)O redox couple is vital in various renewable energy conversion strategies. This work delves into the Co(L-histidine)(2) complex, a functional mimic of oxygen-carrying metalloproteins, and its electrochemical behavior driving the bidirectional oxygen reduction (ORR) and oxygen evolution...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10618691/ https://www.ncbi.nlm.nih.gov/pubmed/37920669 http://dx.doi.org/10.1016/j.isci.2023.108189 |
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author | Saini, Abhishek Das, Chandan Rai, Surabhi Guha, Aritra Dolui, Dependu Majumder, Piyali Dutta, Arnab |
author_facet | Saini, Abhishek Das, Chandan Rai, Surabhi Guha, Aritra Dolui, Dependu Majumder, Piyali Dutta, Arnab |
author_sort | Saini, Abhishek |
collection | PubMed |
description | The O(2)/H(2)O redox couple is vital in various renewable energy conversion strategies. This work delves into the Co(L-histidine)(2) complex, a functional mimic of oxygen-carrying metalloproteins, and its electrochemical behavior driving the bidirectional oxygen reduction (ORR) and oxygen evolution (OER) activity in neutral water. This complex electrocatalyzes O(2) via two distinct pathways: a two-electron O(2)/H(2)O(2) reduction (catalytic rate = 250 s(−1)) and a four-electron O(2) to H(2)O production (catalytic rate = 66 s(−1)). The formation of the key trans-μ-1,2-Co(III)-peroxo intermediate expedites this process. Additionally, this complex effectively oxidizes water to O(2) (catalytic rate = 15606 s(−1)) at anodic potentials via a Co(IV)-oxo species. Additionally, this complex executes the ORR and OER under photocatalytic conditions in neutral water in the presence of appropriate photosensitizer (Eosin-Y) and redox mediators (triethanolamine/ORR and Na(2)S(2)O(8)/OER) at an appreciable rate. These results highlight one of the early examples of both electro- and photoactive bidirectional ORR/OER catalysts operational in neutral water. |
format | Online Article Text |
id | pubmed-10618691 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-106186912023-11-02 A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water Saini, Abhishek Das, Chandan Rai, Surabhi Guha, Aritra Dolui, Dependu Majumder, Piyali Dutta, Arnab iScience Article The O(2)/H(2)O redox couple is vital in various renewable energy conversion strategies. This work delves into the Co(L-histidine)(2) complex, a functional mimic of oxygen-carrying metalloproteins, and its electrochemical behavior driving the bidirectional oxygen reduction (ORR) and oxygen evolution (OER) activity in neutral water. This complex electrocatalyzes O(2) via two distinct pathways: a two-electron O(2)/H(2)O(2) reduction (catalytic rate = 250 s(−1)) and a four-electron O(2) to H(2)O production (catalytic rate = 66 s(−1)). The formation of the key trans-μ-1,2-Co(III)-peroxo intermediate expedites this process. Additionally, this complex effectively oxidizes water to O(2) (catalytic rate = 15606 s(−1)) at anodic potentials via a Co(IV)-oxo species. Additionally, this complex executes the ORR and OER under photocatalytic conditions in neutral water in the presence of appropriate photosensitizer (Eosin-Y) and redox mediators (triethanolamine/ORR and Na(2)S(2)O(8)/OER) at an appreciable rate. These results highlight one of the early examples of both electro- and photoactive bidirectional ORR/OER catalysts operational in neutral water. Elsevier 2023-10-12 /pmc/articles/PMC10618691/ /pubmed/37920669 http://dx.doi.org/10.1016/j.isci.2023.108189 Text en © 2023 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Saini, Abhishek Das, Chandan Rai, Surabhi Guha, Aritra Dolui, Dependu Majumder, Piyali Dutta, Arnab A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title | A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title_full | A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title_fullStr | A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title_full_unstemmed | A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title_short | A homogeneous cobalt complex mediated electro and photocatalytic O(2)/H(2)O interconversion in neutral water |
title_sort | homogeneous cobalt complex mediated electro and photocatalytic o(2)/h(2)o interconversion in neutral water |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10618691/ https://www.ncbi.nlm.nih.gov/pubmed/37920669 http://dx.doi.org/10.1016/j.isci.2023.108189 |
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