Fe Single-Atom Catalyst for Cost-Effective yet Highly Efficient Heterogeneous Fenton Catalysis

Area of Science:

• Materials Science
• Environmental Chemistry
• Catalysis

Background:

• Pyrolysis for catalyst preparation is energy-intensive, limiting practical applications.
• Nitrogen-doped carbon materials are promising for pollutant remediation.
• Developing efficient catalysts for wastewater treatment under mild conditions is crucial.

Purpose of the Study:

• To develop a cost-effective and energy-efficient catalyst for pollutant remediation.
• To investigate the catalytic activity and stability of iron single-atom catalysts supported on polyaniline.
• To explore the mechanism of pollutant degradation using the Fe-PANI catalyst under near-neutral conditions.

Main Methods:

• Synthesized an iron single-atom loaded polyaniline catalyst (Fe-PANI) via impregnation without pyrolysis.
• Employed experimental characterizations and density functional theory (DFT) calculations.
• Evaluated the catalyst's performance in heterogeneous Fenton reactions for organic pollutant degradation.

Main Results:

• Fe-PANI demonstrated high stability of Fe atoms through Fe-N coordination.
• The catalyst exhibited efficient pollutant degradation under near-neutral pH (6) and low H2O2 concentration.
• DFT calculations revealed electron transfer from polyaniline to Fe(III) sites, accelerating reduction.

Conclusions:

• The Fe-PANI catalyst offers a cost-effective and energy-efficient alternative for pollutant remediation.
• High catalytic activity, stability, and adsorption performance make Fe-PANI suitable for industrial wastewater treatment.
• The catalyst's ability to function under mild conditions broadens its applicability.