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Electrochemically‐driven reduction of carbon dioxide mediated by mono‐reduced Mo‐diimine tetracarbonyl complexes: electrochemical, spectroelectrochemical and theoretical studies

Abstract : The activation of carbon dioxide by three different Mo‐diimine complexes [Mo(CO) 4 (L)] (L = bipyridine (bpy), 1,10‐phenantroline (phen) or pyridylindoziline (py‐indz)) has been investigated by electrochemistry and spectroelectrochemistry. Under inert atmosphere, monoreduction of the complexes is ligand‐centred and leads to tetracarbonyl [Mo(CO) 4 (L)] •− species, whereas double reduction induces CO release. Under CO 2 , [Mo(CO) 4 (L)] complexes undergo unexpected coupled chemical‐electrochemical reactions at the first reduction step, leading to the formation of reduced CO 2 derivatives. The experimental results obtained from IR, NIR and UV‐Vis spectroelectrochemistry, as well as DFT calculations, demonstrate an electron‐transfer reaction whose rate is ligand‐dependent.
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https://hal.archives-ouvertes.fr/hal-03213553
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Submitted on : Friday, June 11, 2021 - 4:20:47 PM
Last modification on : Monday, October 11, 2021 - 2:22:09 PM
Long-term archiving on: : Sunday, September 12, 2021 - 8:09:17 PM

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Carlos Garcia Bellido, Lucia Álvarez-Miguel, Daniel Miguel, Noémie Lalaoui, Nolwenn Cabon, et al.. Electrochemically‐driven reduction of carbon dioxide mediated by mono‐reduced Mo‐diimine tetracarbonyl complexes: electrochemical, spectroelectrochemical and theoretical studies. ChemElectroChem, Weinheim : Wiley-VCH, 2021, ⟨10.1002/celc.202100359⟩. ⟨hal-03213553⟩

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