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Efficient Electrochemical N2 Fixation over Donor-Acceptor FeEu─N4 Active Site.

Zhiya Han1, Shiyu Zhang1, Yiting Xu2

  • 1School of Materials, Shanghai Dianji University, No.300, Shuihua Road, Pudong New Area, Shanghai, 200245, China.

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|July 3, 2025
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Summary

This study introduces a novel FeEu─NC catalyst for efficient electrocatalytic nitrogen reduction reaction (NRR). This catalyst significantly boosts ammonia production, offering a sustainable alternative for nitrogen fixation.

Keywords:
In situ characterizationsdonor–acceptordual‐single atomselectrocatalytic nitrogen reduction reactions

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalytic nitrogen reduction reaction (NRR) is crucial for sustainable ammonia production.
  • Current NRR methods suffer from low Faradaic efficiency (FE) and ammonia yield rates.
  • Developing efficient and selective electrocatalysts remains a significant challenge.

Purpose of the Study:

  • To develop an innovative catalyst for enhanced electrocatalytic nitrogen reduction reaction (NRR).
  • To investigate the mechanism of improved NRR performance using a FeEu─NC catalyst.
  • To provide insights into designing efficient electrochemical nitrogen fixation systems.

Main Methods:

  • Synthesis of a novel FeEu─NC catalyst.
  • Electrocatalytic performance testing for NRR, including ammonia yield and Faradaic efficiency.
  • Experimental characterization to elucidate the catalytic mechanism, including electron transfer and N2 activation.

Main Results:

  • The FeEu─NC catalyst achieved an ammonia yield of 221.6 µg h⁻¹ mg⁻¹ and FE of 61.1%.
  • Electron transfer from Eu to Fe atoms was shown to weaken the N≡N bond and enhance N2 activation.
  • The catalyst demonstrated preferential NRR over hydrogen evolution reaction (HER), indicated by differing limiting potentials.

Conclusions:

  • The FeEu─NC catalyst significantly enhances electrocatalytic NRR performance.
  • Intermetallic electron transfer is a key strategy for designing highly active and selective NRR electrocatalysts.
  • This work offers a blueprint for efficient electrochemical nitrogen fixation systems.