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Elaboration et études physico-chimiques de nouveaux catalyseurs moléculaires ou composites pour l'électroréduction du CO2

Abstract : This work deals with the synthesis and physico-chemical investigations of new bifunctional catalysts for CO2 electroreduction. In this context, a “molecular” approach and an “inorganic” one have been developed.
In the “molecular” approach, the bifunctional catalysts are new heterobimetallic complexes such as [Cl(CO)3Re(L)M(Cp*)Cl]+ (L = bisdiimine ligand ; M = Ir, Rh ; Cp* = η5-pentamethyl-cyclopentadienyl). The physico-chemical properties of these complexes and intramolecular interactions between the metallic centres have been studied. Preparative electrocatalysis of CO2 reduction have been performed with these complexes in homogeneous solutions. Finally, modified electrodes have been prepared by anodic electropolymerisation of pyrrole appended complexes. These cathodes have been used for the electrocatalysis of CO2 reduction in hydro-organic or aqueous media.
In the “organic” approach, we design and synthesized electropolymerisable cationic ruthenium complexes as precursors of polymeric materials used to confine metallic particles. The syntheses of [Ru(L)(CO)2(MeCN)2]2+ and [Ru(L)(CO)2(MeCN)]22+ (L = pyrrole substituted by bipyridine) complexes have been developped and their electrochemical properties have been studied. These complexes were coated on electrode surfaces by anodic electropolymerisation of pyrrole group to produce cationic films precursors of bifunctional catalysts.
The activity of bifunctional catalyst was investigated. We especially showed that CO2 reduction proceeds through a cooperative effect.
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https://tel.archives-ouvertes.fr/tel-00011066
Contributor : Aymeric Pellissier <>
Submitted on : Monday, November 21, 2005 - 10:30:06 AM
Last modification on : Friday, November 6, 2020 - 4:08:03 AM
Long-term archiving on: : Friday, April 2, 2010 - 11:10:28 PM

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  • HAL Id : tel-00011066, version 1

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Aymeric Pellissier. Elaboration et études physico-chimiques de nouveaux catalyseurs moléculaires ou composites pour l'électroréduction du CO2. Catalyse. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00011066⟩

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