Highly-active copper oxide/copper electrocatalysts induced from hierarchical copper oxide nanospheres for carbon dioxide reduction reaction

Jinli Qiao, Mengyang Fan, Yishu Fu, Zhengyu Bai, Chengyu Ma, Yuyu Liu, Xiao Dong Zhou

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Novel hierarchical copper oxide (CuXO) nanosphere particles are synthesized, and then coated onto gas diffusion layer (carbon) to form a working electrode for catalyzing CO2 electroreduction. When applying a negative voltage to the working electrode, the metal Cu nanoparticles which are induced by the CuXO nanospheres appear. CuXO and metal Cu together form the CuXO/Cu nanocatalysts which show high catalytic activity for CO2 electroreduction. The morphology, composition, crystal structure and surface area of the CuXO/Cu electrocatalysts are characterized using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The CuXO/Cu nanoparticles are tested as the catalysts for CO2 electroreduction using cyclic voltammetry and linear sweep voltammetry in CO2-saturated 0.5 M KHCO3 aqueous electrolyte. It is found that the CO2 electroreduction activity is highly improved using this CuXO/Cu nanocatalyst, which remains stable during 20 h of electrolysis, along with the high selectivity with a ∼62% of Faradaic efficiency for formate production. Detailed kinetic information relevant to the catalysis is also discussed.

Original languageEnglish
Pages (from-to)559-565
Number of pages7
JournalElectrochimica Acta
Volume153
DOIs
Publication statusPublished - 2015 Jan 20

Keywords

  • Carbon dioxide electroreduction
  • copper oxide nanosphere
  • gas diffusion layer
  • hierarchical structure

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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