A pyrene-triazacyclononane anchor affords high operational stability for CO$_2$RR by a CNT-supported histidine-tagged CODH

Umberto Contaldo (1, 2) , Mathieu Curtil (1) , Julien Pérard (2) , Christine Cavazza (2) , Alan Le Goff (1)

1 DCM - Département de Chimie Moléculaire
2 BEE - BioEnergie et Environnement

An original 1-acetato-4-(1-pyrenyl)-1,4,7-triazacyclononane (AcPyTACN) was synthesized for the immobilization of a His-tagged recombinant CODH from Rhodospirillum rubrum (RrCODH) on carbon-nanotube electrodes. The strong binding of the enzyme at the Ni-AcPyTACN complex affords a high current density of 4.9 mA cm$^{-2}$ towards electroenzymatic CO$_2$ reduction and a high stability of more than 6x10$^{6}$ TON when integrated on a gas-diffusion bioelectrode.

Mots clés: Azamacrocycles; CO2 Reduction; Carbon Monoxide Dehydrogenase; Carbon Nanotubes; Pyrene

Domaines: Chimie de coordination; Matériaux; Bactériologie

Umberto Contaldo, Mathieu Curtil, Julien Pérard, Christine Cavazza, Alan Le Goff. A pyrene-triazacyclononane anchor affords high operational stability for CO$_2$RR by a CNT-supported histidine-tagged CODH. Angewandte Chemie International Edition, 2022, 61 (21), pp.e202117212. ⟨10.1002/anie.202117212⟩. ⟨hal-03631265⟩