Nature Communications (Nov 2023)

Direct OC-CHO coupling towards highly C2+ products selective electroreduction over stable Cu0/Cu2+ interface

  • Xin Yu Zhang,
  • Zhen Xin Lou,
  • Jiacheng Chen,
  • Yuanwei Liu,
  • Xuefeng Wu,
  • Jia Yue Zhao,
  • Hai Yang Yuan,
  • Minghui Zhu,
  • Sheng Dai,
  • Hai Feng Wang,
  • Chenghua Sun,
  • Peng Fei Liu,
  • Hua Gui Yang

DOI
https://doi.org/10.1038/s41467-023-43182-6
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 11

Abstract

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Abstract Electroreduction of CO2 to valuable multicarbon (C2+) products is a highly attractive way to utilize and divert emitted CO2. However, a major fraction of C2+ selectivity is confined to less than 90% by the difficulty of coupling C-C bonds efficiently. Herein, we identify the stable Cu0/Cu2+ interfaces derived from copper phosphate-based (CuPO) electrocatalysts, which can facilitate C2+ production with a low-energy pathway of OC-CHO coupling verified by in situ spectra studies and theoretical calculations. The CuPO precatalyst shows a high Faradaic efficiency (FE) of 69.7% towards C2H4 in an H-cell, and exhibits a significant FEC2+ of 90.9% under industrially relevant current density (j = −350 mA cm−2) in a flow cell configuration. The stable Cu0/Cu2+ interface breaks new ground for the structural design of electrocatalysts and the construction of synergistic active sites to improve the activity and selectivity of valuable C2+ products.