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Single-Atom Catalysts in Heterogeneous Electro-Fenton for Water Treatment: Design, Stability, and Applications
Zehai Xu1, Lushen Xu1, Qin Meng2
1Institute of Oceanic and Environmental Chemical Engineering Center for Membrane and Water Science & Technology Collaborative Innovation Center of Membrane Separation and Water Treatment of Zhejiang, Province Zhejiang University of Technology, Hangzhou, P. R. China.
Single-atom catalysts (SACs) enhance electro-Fenton (EF) processes for wastewater treatment by improving radical generation. Strategies focus on component engineering and stability for efficient pollutant degradation.
Area of Science:
- Advanced Oxidation Technologies
- Materials Science
- Environmental Chemistry
Background:
- Electro-Fenton (EF) is a key advanced oxidation technology for degrading refractory organic pollutants.
- Single-atom catalysts (SACs) offer unique advantages in heterogeneous EF due to atomic dispersion and tunable electronic structures.
Purpose of the Study:
- This review focuses on strategies to enhance SAC performance in EF processes.
- It analyzes challenges and requirements for practical SAC implementation in EF systems.
Main Methods:
- Discusses rational component engineering for SACs using various supports (carbon materials, carbon nitride, MOFs).
- Explores stabilization strategies for SACs via high-coordination and spatial confinement.
- Summarizes design approaches for monometallic and bimetallic SACs.
Main Results:
- SACs demonstrate high efficiency in EF processes for treating antibiotic-contaminated water, textile dyeing wastewater, and endocrine-disrupting compounds.
- Component engineering and stabilization significantly improve SAC catalytic activity and durability.
Conclusions:
- SACs represent a promising frontier for EF technology, offering efficient pollutant degradation.
- Future research should focus on overcoming limitations for practical deployment in industrial wastewater treatment.
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