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Updated: Sep 30, 2025

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A Pyrene-Triazacyclononane Anchor Affords High Operational Stability for CO2 RR by a CNT-Supported Histidine-Tagged
Umberto Contaldo1,2, Mathieu Curtil1, Julien Pérard2
1Univ. Grenoble Alpes, CNRS, DCM, 38000, Grenoble, France.
Abstract:
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 CO2 reduction and a high stability of more than 6×106 TON when integrated on a gas-diffusion bioelectrode.
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