Interweavable Metalloporphyrin-Based Fibers for Indirect Electrocatalysis

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Indirect electrocatalysis applications are limited by electrocatalyst processing and stability.
• Homogeneous electrocatalysts face recycling challenges, while heterogeneous ones can pulverize.
• Advanced processing forms are needed to overcome these limitations for industrial viability.

Purpose of the Study:

• To develop novel metalloporphyrin-based polymer fibers (M-PF) for heterogeneous indirect electrocatalysis.
• To create functional fibers with high strength, flexibility, and designable forms.
• To demonstrate the efficacy of these fibers in specific chemical reactions and assess scalability.

Main Methods:

• A rigid-flexible polymerization strategy using rigid metalloporphyrin and flexible thiourea units.
• Fabrication of M-PF into various fiber forms (knotted, spiral, ply, networks).
• Application of M-PF as heterogeneous redox-mediators in thiol S-S bond cleaving/cyclization and oxidative self-coupling reactions.

Main Results:

• Successfully synthesized metalloporphyrin-based polymer fibers (M-PF) with Ni, Cu, and Zn.
• Demonstrated high strength, flexibility, and interweavable properties of the M-PF.
• Achieved high efficiency in S-S bond cleaving/cyclization and oxidative self-coupling of thiols.
• Enabled scale-up production of 1.25 g M-PF in a batch experiment.

Conclusions:

• Metalloporphyrin-based polymer fibers provide an advanced processing solution for heterogeneous electrocatalysts.
• These functional fibers offer efficient and versatile platforms for indirect electrocatalysis.
• The developed method allows for scalable production, paving the way for industrial applications.