A Pyrene‐Triazacyclononane Anchor Affords High Operational Stability for CO2RR by a CNT‐Supported Histidine‐Tagged CODH

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...

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Veröffentlicht in:	Angewandte Chemie International Edition 2022-05, Vol.61 (21), p.n/a
Hauptverfasser:	Contaldo, Umberto, Curtil, Mathieu, Pérard, Julien, Cavazza, Christine, Le Goff, Alan
Format:	Artikel
Sprache:	eng
Schlagworte:	Azamacrocycles Carbon dioxide Carbon Monoxide Dehydrogenase Carbon Nanotubes CO2 Reduction Histidine Immobilization Pyrene Stability
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Zusammenfassung:	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. A pyrene‐triazacyclononane‐Ni carbon‐nanotube anchor affords million‐turnover stability for an electroenzymatic CO2‐to‐CO reduction reaction by a recombinant carbon monoxide dehydrogenase.
ISSN:	1433-7851 1521-3773
DOI:	10.1002/anie.202117212