A Pyrene-Triazacyclononane Anchor Affords High Operational Stability for CO2 RR by a CNT-Supported Histidine-Tagged CODH

Angew Chem Int Ed Engl. 2022 May 16;61(21):e202117212. doi: 10.1002/anie.202117212. Epub 2022 Mar 23.

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.

Keywords: Azamacrocycles; CO2 Reduction; Carbon Monoxide Dehydrogenase; Carbon Nanotubes; Pyrene.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aldehyde Oxidoreductases* / metabolism
  • Aza Compounds
  • Carbon Dioxide / metabolism
  • Carbon Monoxide / metabolism
  • Histidine
  • Multienzyme Complexes* / metabolism
  • Nickel / metabolism
  • Piperidines
  • Pyrenes

Substances

  • Aza Compounds
  • Multienzyme Complexes
  • Piperidines
  • Pyrenes
  • triazacyclononane
  • Carbon Dioxide
  • Histidine
  • Nickel
  • Carbon Monoxide
  • Aldehyde Oxidoreductases