Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights
While cobaloximes have been protagonists in the molecular (photo)catalytic hydrogen evolution reaction field, researchers originally shed light on the catalytically active metallic center. However, the specific chemical environment of cobalt, including equatorial and axial ligation, has also a stron...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/17/3077 |
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| author | Ioanna K. Sideri Georgios Charalambidis Athanassios G. Coutsolelos Raul Arenal Nikos Tagmatarchis |
| author_facet | Ioanna K. Sideri Georgios Charalambidis Athanassios G. Coutsolelos Raul Arenal Nikos Tagmatarchis |
| author_sort | Ioanna K. Sideri |
| collection | DOAJ |
| description | While cobaloximes have been protagonists in the molecular (photo)catalytic hydrogen evolution reaction field, researchers originally shed light on the catalytically active metallic center. However, the specific chemical environment of cobalt, including equatorial and axial ligation, has also a strong impact on the catalytic reaction. In this article, we aim to demonstrate how pyridine vs. imidazole axial ligation of a cobaloxime complex covalently grafted on graphene affects the hydrogen evolution reaction performance in realistic acidic conditions. While pyridine axial ligation mirrors a drastically superior electrocatalytic performance, imidazole exhibits a remarkable long-term stability. |
| first_indexed | 2024-03-10T01:26:01Z |
| format | Article |
| id | doaj.art-8d00ddfbf7004e57805669d681084ea3 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T01:26:01Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-8d00ddfbf7004e57805669d681084ea32023-11-23T13:50:35ZengMDPI AGNanomaterials2079-49912022-09-011217307710.3390/nano12173077Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction InsightsIoanna K. Sideri0Georgios Charalambidis1Athanassios G. Coutsolelos2Raul Arenal3Nikos Tagmatarchis4Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 116 35 Athens, GreeceChemistry Department, Laboratory of BioInorganic Chemistry, University of Crete, 710 03 Heraklion, GreeceChemistry Department, Laboratory of BioInorganic Chemistry, University of Crete, 710 03 Heraklion, GreeceLaboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, SpainTheoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 116 35 Athens, GreeceWhile cobaloximes have been protagonists in the molecular (photo)catalytic hydrogen evolution reaction field, researchers originally shed light on the catalytically active metallic center. However, the specific chemical environment of cobalt, including equatorial and axial ligation, has also a strong impact on the catalytic reaction. In this article, we aim to demonstrate how pyridine vs. imidazole axial ligation of a cobaloxime complex covalently grafted on graphene affects the hydrogen evolution reaction performance in realistic acidic conditions. While pyridine axial ligation mirrors a drastically superior electrocatalytic performance, imidazole exhibits a remarkable long-term stability.https://www.mdpi.com/2079-4991/12/17/3077cobaloximeaxial ligationgrapheneelectrocatalysishydrogen evolution reaction |
| spellingShingle | Ioanna K. Sideri Georgios Charalambidis Athanassios G. Coutsolelos Raul Arenal Nikos Tagmatarchis Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights Nanomaterials cobaloxime axial ligation graphene electrocatalysis hydrogen evolution reaction |
| title | Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights |
| title_full | Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights |
| title_fullStr | Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights |
| title_full_unstemmed | Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights |
| title_short | Pyridine vs. Imidazole Axial Ligation on Cobaloxime Grafted Graphene: Hydrogen Evolution Reaction Insights |
| title_sort | pyridine vs imidazole axial ligation on cobaloxime grafted graphene hydrogen evolution reaction insights |
| topic | cobaloxime axial ligation graphene electrocatalysis hydrogen evolution reaction |
| url | https://www.mdpi.com/2079-4991/12/17/3077 |
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