Role of microbial electrosynthesis system in CO₂ capture and conversion: a recent advancement toward cathode...

Area of Science:

• Electrochemistry
• Environmental Science
• Biotechnology

Background:

• Microbial electrosynthesis (MES) is an emerging technology for CO2 sequestration, utilizing electrogenic microbes to convert CO2 into carbon compounds.
• Current challenges include low cathode efficiency, poor selectivity, complex microbial metabolism, and high material costs, hindering widespread adoption.
• Effective CO2 reduction requires improved microbe-cathode interactions and electrocatalytic activity.

Purpose of the Study:

• To review advancements in MES technology for CO2 sequestration and conversion.
• To highlight strategies for enhancing biocathode performance, including material modification and operational optimization.
• To discuss the role of microbial biocatalysts and their metabolic pathways in MES.

Main Methods:

• Cathode modification using conventional and novel fabrication techniques.
• Optimization of operating procedures like hybridization and integration of MES systems.
• Analysis of biocathode surface morphology, current density, and biocompatibility.

Main Results:

• Significant improvements in MES capabilities for CO2 reduction have been achieved.
• Various approaches have been tested to boost biocathode performance.
• Enhanced surface morphology, current density, and biocompatibility are key factors.

Conclusions:

• MES presents a promising avenue for utilizing industrial CO2 emissions and creating valuable commodities.
• Further development of biocathode materials and operational strategies is crucial for economic viability.
• Continued research can lead to a sustainable alternative to fossil fuel-derived products.