Bioelectrocatalysis for CO₂ reduction: recent advances and challenges to develop a sustainable system for CO₂...

Area of Science:

• Green chemistry and sustainable energy solutions.
• Catalysis and materials science.
• Biotechnology and environmental engineering.

Background:

• Carbon dioxide (CO2) conversion is crucial for environmental remediation and chemical synthesis.
• Electrocatalysis offers fast electron transfer but suffers from poor selectivity and efficiency.
• Biocatalysis provides high selectivity but is limited by CO2 solubility and reaction rates.

Purpose of the Study:

• To review the synergistic potential of bioelectrocatalysis for CO2 reduction.
• To explore the integration of enzymatic and microbial systems with electrochemistry.
• To highlight advancements in creating valuable C_n products from CO2.

Main Methods:

• Comprehensive review of existing enzymatic-electrocatalysis and microbial-electrocatalysis research.
• Modeling of direct and mediated electron transfer mechanisms.
• Analysis of electrode materials, enzyme/microbe tuning, and biocompatibility.

Main Results:

• Bioelectrocatalysis demonstrates high selectivity, improved faradaic efficiency, and valuable C_n product formation.
• Electron transfer routes (direct and mediated) are critical for system performance.
• Synergistic effects of electrode materials, enzymes, and microbes enhance catalytic activity.

Conclusions:

• Bioelectrocatalysis presents a promising green and sustainable pathway for CO2 reduction.
• Integration with solar energy-driven photo-electrochemical techniques further enhances efficiency.
• This approach offers a blueprint for efficient and mild CO2 valorization into C_n products.