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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...

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Autores principales: Saini, Abhishek, Das, Chandan, Rai, Surabhi, Guha, Aritra, Dolui, Dependu, Majumder, Piyali, Dutta, Arnab
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
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.
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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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