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<p>Electrochemical urea synthesis has recently emerged as a fascinating energy-efficient alternative route, while it remains challenging to achieve simultaneously high production rate and Faradaic efficiency. Herein, we realize an energy-favorable electrochemical C-N coupling path through CO<sub>2</sub> and NO<sub>3</sub><sup>−</sup> co-reduction at the heterointerfaces of Cu/Cu<sub>2</sub>O microparticles, generated by in-situ electrochemical engineering on bulk Cu<sub>2</sub>O. We achieve urea production rate of 632.1 μg h<sup>−1</sup>mg<sub>cat.</sub><sup>−1</sup> with a corresponding Faradaic efficiency of 42.3% at −0.3 V (versus RHE) under ambient conditions. Operando synchrotron radiation-Fourier transform infrared spectroscopy, along with theoretical calculations, reveals the coupling of intermediates NOH* and CO* at the heterointerfaces, benefiting from the modified electronic structure. This work provides a practical route for catalyst design and insights into urea electrosynthesis systems.</p>

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Surface engineering on bulk Cu2O for efficient electrosynthesis of urea

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月5日

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  • Zechuan Dai,
  • Yanxu Chen,
  • Huaikun Zhang,
  • Mingyu Cheng,
  • Bocheng Zhang,
  • Pingyi Feng,
  • Yafei Feng,
  • Genqiang Zhang

摘要

Electrochemical urea synthesis has recently emerged as a fascinating energy-efficient alternative route, while it remains challenging to achieve simultaneously high production rate and Faradaic efficiency. Herein, we realize an energy-favorable electrochemical C-N coupling path through CO2 and NO3− co-reduction at the heterointerfaces of Cu/Cu2O microparticles, generated by in-situ electrochemical engineering on bulk Cu2O. We achieve urea production rate of 632.1 μg h−1mgcat.−1 with a corresponding Faradaic efficiency of 42.3% at −0.3 V (versus RHE) under ambient conditions. Operando synchrotron radiation-Fourier transform infrared spectroscopy, along with theoretical calculations, reveals the coupling of intermediates NOH* and CO* at the heterointerfaces, benefiting from the modified electronic structure. This work provides a practical route for catalyst design and insights into urea electrosynthesis systems.