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Updated: Nov 11, 2025

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Dual Interface-Engineered Tin Heterostructure for Enhanced Ambient Ammonia Electrosynthesis.

Qinglin Li1,2, Yinpan Zhang1, Xiaoxue Wang1

  • 1CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.

ACS Applied Materials & Interfaces
|March 26, 2021
PubMed
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Researchers developed an efficient porous tin heterostructure for sustainable ammonia synthesis via electrocatalytic nitrogen reduction reaction (NRR). This novel catalyst shows high ammonia yield and efficiency, offering a greener alternative to the Haber-Bosch process.

Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Sustainable ammonia synthesis is crucial, but the Haber-Bosch process is energy-intensive.
  • Electrocatalytic nitrogen reduction reaction (NRR) offers a promising alternative.
  • Developing efficient electrocatalysts for NRR remains a significant challenge due to sluggish kinetics.

Purpose of the Study:

  • To report an efficient porous tin heterostructure with dual interfaces for ammonia electrosynthesis.
  • To investigate the catalyst's performance in terms of yield rate, Faradaic efficiency, and stability.
  • To elucidate the role of dual interfaces in enhancing NRR activity.

Main Methods:

  • Synthesis of a porous tin heterostructure.
  • Electrocatalytic performance testing for NRR under ambient conditions.
Keywords:
N2 reduction reactionSndual interfacial engineeringelectrocatalysisheterostructure

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  • Comprehensive characterizations and theoretical calculations (e.g., DFT).

    • Main Results:

    • Achieved high NH3 yield rate (30.3 μg h⁻¹mg⁻¹cat) and Faradaic efficiency (41.3%) at -0.05 V (vs RHE).
    • Demonstrated excellent stability in 0.1 M Na2SO4 solution.
    • The dual interfaces in the tin heterostructure were found to enhance N2 chemisorption, activation, electron transfer, and reduce the energy barrier for NH3 formation.

    Conclusions:

    • The porous tin heterostructure with intimate dual interfaces is highly efficient for electrocatalytic ammonia synthesis.
    • Dual interfaces are critical for promoting NRR activity by optimizing active sites and reaction kinetics.
    • This work highlights a new strategy for designing advanced electrocatalysts for sustainable ammonia production.