Electroreduction of CO2 to ethanol by electrochemically deposited Cu-lignin complexes on Ni foam electrodes

Debabrata Chanda, Ramato Ashu Tufa, David Aili, Suddhasatwa Basu*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A low cost, non-toxic and highly selective catalyst based on a Cu-lignin molecular complex is developed for CO2 electroreduction to ethanol. Ni foam (NF), Cu-Ni foam (Cu-NF) and Cu-lignin-Ni foam (Cu-lignin-NF) were prepared by a facile and reproducible electrochemical deposition method. The electrochemical CO2 reduction activity of Cu-lignin-NF was found to be higher than Cu-NF. A maximum faradaic efficiency of 23.2 % with current density of 22.5 mA cm-2 was obtained for Cu-lignin-NF at -0.80 V (vs. RHE) in 0.1 M Na2SO4 towards ethanol production. The enhancement of catalytic performance is attributed to the growth of the number of active sites and the change of oxidation states of Cu and NF due to the presence of lignin.
Original languageEnglish
Article number055403
JournalNanotechnology
Volume33
Number of pages11
ISSN0957-4484
DOIs
Publication statusPublished - 2022

Keywords

  • CO2 electroreduction
  • Cu-lignin complex
  • Electrocatalyst
  • Selectivity

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