Functionalization of Carbon Nanotubes with Nickel Cyclam for the Electrochemical Reduction of CO2

Silvia Pugliese, Ngoc Tran Huan, Jérémy Forte, Domenico Grammatico, Sandrine Zanna, Bao Lian Su, Yun Li, Marc Fontecave

Research output: Contribution to journalArticlepeer-review

Abstract

The exploitation of molecular catalysts for CO2 electrolysis requires their immobilization on the cathode of the electrolyzer. As an illustration of this approach, a Ni-cyclam complex with a cyclam derivative functionalized with a pyrene moiety is synthesized, found to be a selective catalyst for CO2 electroreduction to CO, and immobilized on a carbon nanotube-coated gas diffusion electrode by using a noncovalent binding strategy. The as-prepared electrode is efficient, selective, and robust for electrocatalytic reduction of CO2 to CO. Very high turnover numbers (ca. 61460) and turnover frequencies (ca. 4.27 s−1) are enabled by the novel electrode material in organic solvent-water mixtures saturated with CO2. This material provides an interesting platform for further improvement.

Original languageEnglish
Pages (from-to)6449-6456
Number of pages8
JournalChemSusChem
Volume13
Issue number23
Early online date21 Oct 2020
DOIs
Publication statusPublished - 7 Dec 2020

Keywords

  • carbon nanotubes
  • CO conversion
  • electrocatalysis
  • heterogenization
  • nickel Cyclam

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