Assessing the Electrocatalytic Properties of the {Cp*Rh III } 2+ -Polyoxometalate Derivative [H 2 PW 11 O 39 {Rh III Cp*(OH 2 )}] 3- towards CO 2 Reduction - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2019

Assessing the Electrocatalytic Properties of the {Cp*Rh III } 2+ -Polyoxometalate Derivative [H 2 PW 11 O 39 {Rh III Cp*(OH 2 )}] 3- towards CO 2 Reduction

Résumé

Storage of electricity produced intermittently by renewable energy sources is a societal issue. Besides the use of batteries and supercapacitors, conversion of excess electricity into chemical energy is also actively investigated. The conversion of CO2 to fuel or fuel precursors is an option that requires the use of a catalyst to overcome the high activation energy barrier. Of molecular catalysts, metal complexes with polypyridyl ligands are well represented, among which the [Cp*Rh(bpy)Cl] + and [M(bpy)(CO)3X] (M = Re, Mn) complexes. As redox non-innocent ligand, the bipyridine ligand is generally involved in the reduction mechanisms. It is thus tempting to replace it by other redox non-innocent ligands such as vacant polyoxometalates (POMs). We have thus prepared [α-H2PW11O39{Rh(III)Cp*(OH2}] 3-which is closely related to [Cp*Rh(III)(bpy)Cl] + by substitution of the monovacant [PW11O39] 7-Keggin-type POM for the bipyridine ligand. Its activity towards CO2 reduction has been assessed in acetonitrile in the presence of water. Compared to [Cp*Rh(bpy)Cl] + that produces formate selectively over CO and H2, the POM derived catalyst favours proton reduction over CO2 reduction.

Domaines

Catalyse
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Dates et versions

hal-02159758 , version 1 (19-06-2019)

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Marcelo Girardi, Dominique Platzer, Sophie Griveau, Fethi Bedioui, Sandra Alves, et al.. Assessing the Electrocatalytic Properties of the {Cp*Rh III } 2+ -Polyoxometalate Derivative [H 2 PW 11 O 39 {Rh III Cp*(OH 2 )}] 3- towards CO 2 Reduction. European Journal of Inorganic Chemistry, 2019, 2019 (3-4), pp.387-393. ⟨10.1002/ejic.201800454⟩. ⟨hal-02159758⟩
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