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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

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Selective CO₂ Electroreduction from Tuneable Naphthalene-Based Porous Polyimide Networks.

Basiram Brahma Narzary¹, Benjamin C Baker¹, Charl F J Faul¹

¹School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK.

Advanced Materials (Deerfield Beach, Fla.)

|March 14, 2023

Summary

Researchers developed metal-free porous polyimides to capture and convert carbon dioxide (CO2) into valuable fuels like formate and methanol. This breakthrough offers sustainable solutions for CO2 utilization and chemical production.

Keywords:

Hansen solubility parameters carbon dioxide capture and electrocatalytic conversion pore size distribution and surface area optimisation porous polyimides

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Area of Science:

Materials Science
Catalysis
Electrochemistry

Background:

Porous polyimides (pPIs) are advanced materials with tunable structures.
Carbon dioxide (CO2) capture and conversion are critical for environmental sustainability.
Electrocatalysis offers a promising route for CO2 valorization.

Purpose of the Study:

To synthesize and optimize porous polyimides using the Bristol-X'an-Jiatong (BXJ) approach.
To investigate the CO2 capture capabilities of these optimized materials.
To explore the use of these porous organic frameworks as metal-free electrocatalysts for CO2 conversion.

Main Methods:

Synthesis of porous polyimides (pPIs).
Optimization of surface area and pore size using the BXJ approach.
Electrocatalytic testing for CO2 reduction to formate and methanol.

Main Results:

Optimized pPIs demonstrated tunable porous network properties for CO2 capture.
The pPIs were successfully employed as electrocatalysts for CO2 conversion.
High Faradaic efficiencies were achieved: 91% for CO2 to formate and 85% for CO2 to methanol.

Conclusions:

The BXJ approach effectively tunes porous materials for CO2 capture and electrocatalysis.
Porous organic frameworks show significant potential as metal-free catalysts for CO2 reduction.
This work opens avenues for sustainable fuel and feedstock generation from CO2.