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Related Experiment Video

Updated: Jun 21, 2025

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Functional partitioning synergistically enhances multi-scenario nitrate reduction.

Yuelong Liu1, Jin Zhang1, Rui Bai1

  • 1Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China.

Journal of Colloid and Interface Science
|July 10, 2024
PubMed
Summary

This study developed a novel catalyst (CoP3/Cu3P@CF) for efficient electrocatalytic nitrate reduction reaction (eNitRR) to produce ammonia. The catalyst achieves high ammonia yield and Faradaic efficiency, enabling dual ammonia production and power supply functions.

Keywords:
AmmoniaBatteryElectrocatalysisNitrate reductionSynergistic effect

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis
  • Chemical Engineering

Background:

  • Distributed ammonia synthesis via electrocatalytic nitrate reduction reaction (eNitRR) requires advanced catalysts.
  • Existing catalysts often lack efficiency and functional integration for practical applications.
  • Developing cost-effective and high-performance catalysts is crucial for eNitRR.

Purpose of the Study:

  • To design and synthesize a functionally compartmentalized and synergistically integrated catalyst for eNitRR.
  • To achieve efficient and selective ammonia synthesis from nitrate reduction.
  • To demonstrate the catalyst's performance in a dual-function ammonia production and power supply system.

Main Methods:

  • Fabrication of partitionable CoP3 and Cu3P modules on a copper foam substrate (CoP3/Cu3P@CF).
  • Electrocatalytic performance evaluation for nitrate reduction in aqueous environments.
  • Assembly of a Zn-nitrate flow battery utilizing the catalyst for ammonia production and power generation.
  • Density functional theory (DFT) calculations to elucidate the catalytic mechanism.

Main Results:

  • The CoP3/Cu3P@CF catalyst exhibited an ammonia yield rate of 23988.2 μg h⁻¹ cm⁻² with near 100% Faradaic efficiency.
  • The integrated Zn-nitrate flow battery demonstrated dual functionality for ammonia synthesis and power supply, driven by solar energy.
  • Ammonia recovery reached 753.9 mg L⁻¹, showcasing the catalyst's effectiveness in multiple application scenarios.
  • DFT calculations revealed a relay synergistic mechanism where CoP3 activates nitrate and Cu3P facilitates proton transfer for ammonia formation.

Conclusions:

  • The developed CoP3/Cu3P@CF catalyst offers a promising strategy for efficient and selective electrocatalytic ammonia synthesis.
  • The integrated flow battery system provides a sustainable and dual-purpose solution for ammonia production and energy supply.
  • This work presents a novel, easily obtainable catalyst and an alternative approach for advancing eNitRR technology under various conditions.