A novel Au/electroactive poly(amic acid) composite as an effective catalyst for p-nitrophenol reduction

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Development of efficient and stable catalysts is crucial for chemical transformations.
• Gold nanoparticles offer unique catalytic properties but require stable supports.
• Electroactive polymers provide versatile platforms for nanoparticle immobilization.

Purpose of the Study:

• To synthesize and characterize a novel gold/electroactive poly(amic acid) (Au/EPAA) composite.
• To evaluate the catalytic performance of the Au/EPAA composite in the reduction of p-nitrophenol.
• To assess the stability and reusability of the synthesized catalyst.

Main Methods:

• Synthesis of electroactive poly(amic acid) (EPAA) via oxidative coupling polymerization.
• Anchoring of gold nanoparticles onto EPAA through interactions with amino and carboxyl groups.
• Characterization using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM).

Main Results:

• Characterization confirmed well-dispersed gold nanoparticles on the EPAA surface.
• The Au/EPAA composite rapidly reduced p-nitrophenol to p-aminophenol within 5 minutes at room temperature.
• A high rate constant of 0.84 min⁻¹ was achieved, with >92% conversion in cycling measurements.

Conclusions:

• The synthesized Au/EPAA composite exhibits excellent catalytic activity for p-nitrophenol reduction.
• The material demonstrates superior stability and reusability, making it a promising catalyst.
• This study highlights the potential of Au/EPAA composites in catalytic applications.