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Updated: Jun 4, 2026

Electrochemically and Bioelectrochemically Induced Ammonium Recovery
09:50

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Published on: January 22, 2015

Photothermal-Responsive Artificial Enzyme Assembly Engineering for Near-Unity Nitrate-to-Ammonia Electrocatalysis.

Xianhu Long1, Zhangnan Yao1, Ting Li1

  • 1School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China.

Angewandte Chemie (International Ed. in English)
|June 3, 2026
PubMed
Summary

Researchers developed an artificial enzyme assembly for nitrate conversion, significantly boosting ammonia yield. This photothermal catalyst mimics natural enzymes for enhanced nitrate reduction under disturbances.

Keywords:
H2O dissociationNH3 synthesisNO3‒ reductionartificial enzymephotothermal

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Area of Science:

  • Catalysis
  • Materials Science
  • Biomimetic Chemistry

Background:

  • Natural enzymatic nitrate (NO3‒) conversion faces limitations due to anthropogenic disturbances.
  • Developing artificial systems to overcome these limitations is crucial for efficient nitrate conversion.

Purpose of the Study:

  • To engineer an artificial enzyme assembly with a photothermal module and biomimetic catalytic framework.
  • To enhance nitrate (NO3‒) conversion efficiency and ammonia (NH3) yield beyond natural enzyme capabilities.

Main Methods:

  • Fabrication of an integrated catalyst (Cux/Cu1-NC) with Cu clusters and single atoms on nitrogen-doped carbon.
  • Utilized a photo-electro system for nitrate reduction.
  • Employed mechanistic studies, in situ detection, and physical modeling to understand catalytic processes.

Main Results:

  • The integrated catalyst achieved nearly 100% ammonia (NH3) selectivity.
  • Observed a 23.1-fold increase in NH3 yield compared to unmodified single-atom catalysts.
  • Demonstrated that Cu clusters and single atoms mimic natural enzyme active sites, while the substrate facilitates proton transfer and photothermal effects enhance reactivity.

Conclusions:

  • The artificial enzyme assembly effectively mimics natural copper-containing nitrite reductase (Cu-NIR) for nitrate reduction.
  • The photothermal module significantly enhances catalytic activity and ammonia yield.
  • This work presents a novel photothermal-responsive artificial enzyme strategy for efficient nitrate conversion.