A New Hexagonal Cobalt Nanosheet Catalyst for Selective CO2Conversion to Ethanal

Jie Yin, Zhouyang Yin, Jing Jin, Mingzi Sun, Bolong Huang, Honghong Lin, Zhenhui Ma, Michelle Muzzio, Mengqi Shen, Chao Yu, Hong Zhang, Yong Peng, Pinxian Xi, Chun Hua Yan, Shouheng Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


We report a new form of catalyst based on ferromagnetic hexagonal-close-packed (hcp) Co nanosheets (NSs) for selective CO2RR to ethanal, CH3CHO. In all reduction potentials tested from −0.2 to −1.0 V (vs RHE) in 0.5 M KHCO3solution, the reduction yields ethanal as a major product and ethanol/methanol as minor products. At −0.4 V, the Faradaic efficiency (FE) for ethanal reaches 60% with current densities of 5.1 mA cm-2and mass activity of 3.4 A g-1(total FE for ethanal/ethanol/methanol is 82%). Density functional theory (DFT) calculations suggest that this high CO2RR selectivity to ethanal on the hcp Co surface is attributed to the unique intralayer electron transfer, which not only promotes [OC-CO]* coupling but also suppresses the complete hydrogenation of the coupling intermediates to ethylene, leading to highly selective formation of CH3CHO.

Original languageEnglish
Pages (from-to)15335-15343
Number of pages9
JournalJournal of the American Chemical Society
Issue number37
Publication statusPublished - 22 Sep 2021

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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