Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction
Abstract While considerable efforts have been devoted to developing functionalized covalent organic frameworks (COFs) as oxygen evolution electrocatalysts in recent years, studies related to the investigation of the true catalytically active species for the oxygen evolution reaction (OER) remain lac...
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| Format: | Article |
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202413555 |
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| author | Pouya Hosseini Andrés Rodríguez‐Camargo Yiqun Jiang Siyuan Zhang Christina Scheu Liang Yao Bettina V. Lotsch Kristina Tschulik |
| author_facet | Pouya Hosseini Andrés Rodríguez‐Camargo Yiqun Jiang Siyuan Zhang Christina Scheu Liang Yao Bettina V. Lotsch Kristina Tschulik |
| author_sort | Pouya Hosseini |
| collection | DOAJ |
| description | Abstract While considerable efforts have been devoted to developing functionalized covalent organic frameworks (COFs) as oxygen evolution electrocatalysts in recent years, studies related to the investigation of the true catalytically active species for the oxygen evolution reaction (OER) remain lacking in the field. In this work, the active species of a cobalt‐functionalized COF (TpBpy‐Co) is studied as electrochemical OER catalyst through a series of electrochemical measurements and post‐electrolysis characterizations. These results suggest that cobalt oxide‐based nanoparticles are formed in TpBpy‐Co from Co(II) ions coordinated to the COF backbone when exposing TpBpy‐Co to alkaline media, and these newly formed nanoparticles serve as the primary active species for oxygen evolution. The study thus emphasizes that caution is warranted when assessing the catalytic activity of COF electrocatalysts, as the pristine COF may act as the pre‐catalyst, with the active species forming only under catalyst operating conditions. Specifically, strong coordination between COFs and metal centers under electrochemical operation conditions is crucial to avoid unintended transformation of COF electrocatalysts. This work thus contributes to the rational development of earth‐abundant COF OER catalysts for the production of green hydrogen from renewable resources. |
| format | Article |
| id | doaj-art-2269c1eb8576455ca86f5c47178450c4 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-2269c1eb8576455ca86f5c47178450c42025-01-20T13:04:18ZengWileyAdvanced Science2198-38442025-01-01123n/an/a10.1002/advs.202413555Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution ReactionPouya Hosseini0Andrés Rodríguez‐Camargo1Yiqun Jiang2Siyuan Zhang3Christina Scheu4Liang Yao5Bettina V. Lotsch6Kristina Tschulik7Faculty of Chemistry and Biochemistry Analytical Chemistry II Ruhr‐Universität Bochum Universitätsstrasse150 44801 Bochum GermanyNanochemistry Department Max Planck Institute for Solid State Research Heisenbergstraße 1 70569 Stuttgart GermanyMax Planck Institute for Sustainable Materials Max‐Planck‐Straße 1 40237 Düsseldorf GermanyMax Planck Institute for Sustainable Materials Max‐Planck‐Straße 1 40237 Düsseldorf GermanyMax Planck Institute for Sustainable Materials Max‐Planck‐Straße 1 40237 Düsseldorf GermanyNanochemistry Department Max Planck Institute for Solid State Research Heisenbergstraße 1 70569 Stuttgart GermanyNanochemistry Department Max Planck Institute for Solid State Research Heisenbergstraße 1 70569 Stuttgart GermanyFaculty of Chemistry and Biochemistry Analytical Chemistry II Ruhr‐Universität Bochum Universitätsstrasse150 44801 Bochum GermanyAbstract While considerable efforts have been devoted to developing functionalized covalent organic frameworks (COFs) as oxygen evolution electrocatalysts in recent years, studies related to the investigation of the true catalytically active species for the oxygen evolution reaction (OER) remain lacking in the field. In this work, the active species of a cobalt‐functionalized COF (TpBpy‐Co) is studied as electrochemical OER catalyst through a series of electrochemical measurements and post‐electrolysis characterizations. These results suggest that cobalt oxide‐based nanoparticles are formed in TpBpy‐Co from Co(II) ions coordinated to the COF backbone when exposing TpBpy‐Co to alkaline media, and these newly formed nanoparticles serve as the primary active species for oxygen evolution. The study thus emphasizes that caution is warranted when assessing the catalytic activity of COF electrocatalysts, as the pristine COF may act as the pre‐catalyst, with the active species forming only under catalyst operating conditions. Specifically, strong coordination between COFs and metal centers under electrochemical operation conditions is crucial to avoid unintended transformation of COF electrocatalysts. This work thus contributes to the rational development of earth‐abundant COF OER catalysts for the production of green hydrogen from renewable resources.https://doi.org/10.1002/advs.202413555active sitecatalysiscatalyst transformationcovalent organic frameworkmetal coordination |
| spellingShingle | Pouya Hosseini Andrés Rodríguez‐Camargo Yiqun Jiang Siyuan Zhang Christina Scheu Liang Yao Bettina V. Lotsch Kristina Tschulik Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction Advanced Science active site catalysis catalyst transformation covalent organic framework metal coordination |
| title | Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction |
| title_full | Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction |
| title_fullStr | Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction |
| title_full_unstemmed | Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction |
| title_short | Shedding Light on the Active Species in a Cobalt‐Based Covalent Organic Framework for the Electrochemical Oxygen Evolution Reaction |
| title_sort | shedding light on the active species in a cobalt based covalent organic framework for the electrochemical oxygen evolution reaction |
| topic | active site catalysis catalyst transformation covalent organic framework metal coordination |
| url | https://doi.org/10.1002/advs.202413555 |
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