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<p>Copper-based catalysts play a pivotal role in CO<sub>2</sub> electroreduction (CER) toward multi-carbon (C<sub>2+</sub>) products. However, achieving a high selectivity for C<sub>2+</sub> products remains a formidable challenge. In this work, a facile electrochemical oxidation-reduction technique was developed to modulate the surface morphology of a copper foil using sulfur and oxygen as auxiliary atoms. Optimization of this approach resulted in an atomically reconstructed copper electrode (denoted as Cu-50) with a surface tensile strain of 1.1% and preferential exposure of Cu(100) facets. Cu-50 delivered remarkable Faradaic efficiencies (up to 72%) for C<sub>2+</sub> products during CER, with a 53% selectivity for ethylene (10-fold higher than for a non-reconstructed Cu foil). This work guides the design of advanced copper-based catalysts that promote C–C coupling, demonstrating the potential of tailored copper structures for efficient conversion of CO<sub>2</sub> to valuable C<sub>2+</sub> products.</p>

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Selective C–C coupling via copper atom reconfiguration in CO2 electroreduction

  • 期刊论文

  • 发表日期：

    2025年2月23日

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  • Linlin Zhou,
  • Yang Zhong,
  • Kai Sun,
  • Benqiang Tian,
  • Haoyang Wu,
  • Wei Liu,
  • Tong Wan,
  • Huijun Xin,
  • Chen Deng,
  • Xiaojie Li,
  • Jinjie Fang,
  • Geoffrey I. N. Waterhouse,
  • Yun Kuang,
  • Daojin Zhou,
  • Xiaoming Sun

摘要

Copper-based catalysts play a pivotal role in CO2 electroreduction (CER) toward multi-carbon (C2+) products. However, achieving a high selectivity for C2+ products remains a formidable challenge. In this work, a facile electrochemical oxidation-reduction technique was developed to modulate the surface morphology of a copper foil using sulfur and oxygen as auxiliary atoms. Optimization of this approach resulted in an atomically reconstructed copper electrode (denoted as Cu-50) with a surface tensile strain of 1.1% and preferential exposure of Cu(100) facets. Cu-50 delivered remarkable Faradaic efficiencies (up to 72%) for C2+ products during CER, with a 53% selectivity for ethylene (10-fold higher than for a non-reconstructed Cu foil). This work guides the design of advanced copper-based catalysts that promote C–C coupling, demonstrating the potential of tailored copper structures for efficient conversion of CO2 to valuable C2+ products.