New Spectroelectrochemical Insights in Mn and Re bipyridine Complexes as Catalysts for the Electrochemical Reduction of CO2

Alice Barbero; Laura Rotundo; Chiara Reviglio; Roberto Gobetto; Romana Sokolova; Jan Fiedler; Carlo Nervi

doi:10.20944/preprints202309.1169.v1

A peer-reviewed article of this Preprint also exists.

Barbero, A.; Rotundo, L.; Reviglio, C.; Gobetto, R.; Sokolova, R.; Fiedler, J.; Nervi, C. New Spectroelectrochemical Insights into Manganese and Rhenium Bipyridine Complexes as Catalysts for the Electrochemical Reduction of Carbon Dioxide. Molecules 2023, 28, 7535. Barbero, A.; Rotundo, L.; Reviglio, C.; Gobetto, R.; Sokolova, R.; Fiedler, J.; Nervi, C. New Spectroelectrochemical Insights into Manganese and Rhenium Bipyridine Complexes as Catalysts for the Electrochemical Reduction of Carbon Dioxide. Molecules 2023, 28, 7535.

Abstract

Four different Mn and Re catalysts for electrochemical CO2 reduction have been studied by IR spectroelectrochemistry (SEC) in dry acetonitrile. In the case of Mn(apbpy)(CO)3Br (apbpy= 4(4-aminophenyl)-2,2’-bipyridine) SEC suggests that a very slow catalytic reduction of CO2 occurs in acetonitrile also in the absence of proton donors, but at rather negative potentials. On the contrary, the corresponding Re(apbpy)(CO)3Br clearly displays a slow catalytic conversion already at the first reduction potential. Switching to saturated CO2 solutions in a mixture of acetonitrile and 5% of water as proton donor, the SEC of Mn(apbpy)(CO)3Br displays faster catalytic behavior.

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New Spectroelectrochemical Insights in Mn and Re bipyridine Complexes as Catalysts for the Electrochemical Reduction of CO₂

Abstract

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