The electrochemical production of C2/C3 species from carbon dioxide on copper-modified boron-doped diamond electrodes

Prastika K. Jiwanti, Keisuke Natsui, Kazuya Nakata, Yasuaki Einaga

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report on the first observation of the production of C2/C3 species from the electrochemical reduction of CO2 at the surfaces of copper-modified boron-doped diamond (Cu-BDD) electrodes in aqueous media at room temperature and ambient pressure. The product distribution is dependent on the amount of deposited Cu and the applied potential. At low potential, −1.0 V (vs. Ag/AgCl), ethanol was observed as the main product with acetaldehyde and acetone as side products. The highest faradaic efficiencies obtained for ethanol, acetaldehyde and acetone were 42.4%, 13.7% and 7%, respectively. The Cu particles on the surfaces of the BDD electrodes remained stable, showing insignificant differences after the CO2 electroreduction process under these particular conditions. The efficiency dropped with increasing Cu deposition time and at high reduction potentials. Moreover, we present comparisons with a Cu plate and Cu-modified glassy carbon as working electrodes under the same conditions, which explains the specific behavior of the CO2 reduction process on the Cu-BDD electrode.

Original languageEnglish
Pages (from-to)414-419
Number of pages6
JournalElectrochimica Acta
Volume266
DOIs
Publication statusPublished - 2018 Mar 10

Keywords

  • Boron-doped diamond
  • CO electrochemical reduction
  • Copper

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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