Abstract
The development of molecular catalysts for CO 2 electroreduction within electrolyzers requests their immobilization on the electrodes. While a variety of methods have been explored for the heterogenization of homogeneous complexes, a novel approach using a hierarchical porous carbon material, derived from a metal-organic framework, is reported as a support for the well-known molecular catalyst [Re(bpy)(CO) 3 Cl] (bpy=2,2'-bipyridine). This cathodic hybrid material, named Re@HPC (HPC=hierarchical porous carbon), has been tested for CO 2 electroreduction using a mixture of an ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate, EMIM) and water as the electrolyte. Interestingly, it catalyzes the conversion of CO 2 into a mixture of carbon monoxide and formic acid, with a selectivity that depends on the applied potential. The present study thus reveals that Re@HPC is a remarkable catalyst, enjoying excellent activity (turnover numbers for CO 2 reduction of 7835 after 2 h at -1.95 V vs. Fc/Fc + with a current density of 6 mA cm -2 ) and good stability. These results emphasize the advantages of integrating molecular catalysts onto such porous carbon materials for developing novel, stable and efficient, catalysts for CO 2 reduction.
Original language | English |
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Pages (from-to) | 6418-6425 |
Number of pages | 8 |
Journal | ChemSusChem |
Volume | 13 |
Issue number | 23 |
Early online date | 25 Sept 2020 |
DOIs | |
Publication status | Published - 7 Dec 2020 |
Funding
D.G and S.P acknowledge financial support from the European School on Artificial Leaf: Electrodes & Devices (eSCALED). This work is part of the eSCALED project which has received funding from the European's Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 765376. This research used resources of the Electron Microscopy Service located at the University of Namur. This Service is member of the “Plateforme Technologique Morphologie -Imagerie”. SEM images were also collected by F. Pillier at the Laboratoire Interfaces et Systèmes Electrochimiques, Paris, France. D.G and S.P acknowledge financial support from the European School on Artificial Leaf: Electrodes & Devices (eSCALED). This work is part of the eSCALED project which has received funding from the European's Union's Horizon 2020 research and innovation programme under the Marie Sklodowska‐Curie grant agreement No 765376. This research used resources of the Electron Microscopy Service located at the University of Namur. This Service is member of the “Plateforme Technologique Morphologie ‐Imagerie”. SEM images were also collected by F. Pillier at the Laboratoire Interfaces et Systèmes Electrochimiques, Paris, France.
Funders | Funder number |
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European School on Artificial Leaf: Electrodes & Devices | |
European's Union's Horizon 2020 research and innovation programme | |
Laboratoire Interfaces et Systèmes Electrochimiques | |
Plateforme Technologique Morphologie | |
Horizon 2020 Framework Programme | |
H2020 Marie Skłodowska-Curie Actions | 765376 |
Keywords
- catalysis
- CO electroreduction
- heterogenization
- hierarchical porous carbon
- ionic liquid
- rhenium complex
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Morphology - Imaging
Cecchet, F. (Manager) & Renard, H.-F. (Manager)
Technological Platform Morphology - ImagingFacility/equipment: Technological Platform
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Physical Chemistry and characterization(PC2)
Wouters, J. (Manager), Aprile, C. (Manager) & Fusaro, L. (Manager)
Technological Platform Physical Chemistry and characterizationFacility/equipment: Technological Platform