Effect of mass transfer and kinetics in ordered Cu-mesostructures for electrochemical CO2 reduction

Hakhyeon Song, Mintaek Im, Jun Tae Song, Jung Ae Lim, Beom Sik Kim, Youngkook Kwon, Sangwoo Ryu, Jihun Oh

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Mass transfer, kinetics, and mechanism of electrochemical CO2 reduction have been explored on a model mesostructure of highly-ordered copper inverse opal (Cu-IO), which was fabricated by Cu electrodeposition in a hexagonally-closed packed polystyrene template. As the number of Cu-IO layers increases, the formation of C2 products such as C2H4 and C2H5OH was significantly enhanced at reduced overpotentials (∼200 mV) compared to a planar Cu electrode. At the thickest layer, we observe for the first time the formation of acetylene (C2H2), which can be generated through a kinetically slow reaction pathway and be a key descriptor in the unveiling of the C–C coupling reaction mechanism. Based on our experimental observation, a plausible reaction pathway in Cu mesostructures is rationalized.

Original languageEnglish
Pages (from-to)391-396
Number of pages6
JournalApplied Catalysis B: Environmental
Volume232
DOIs
Publication statusPublished - Sep 15 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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