Strategies for Enhancing Stability in Electrochemical CO₂ Reduction

Area of Science:

• Electrochemistry
• Catalysis
• Sustainable Energy

Background:

• The electrochemical carbon dioxide reduction reaction (CO2RR) is a promising technology for sustainable energy and carbon emission reduction.
• A major challenge for large-scale CO2RR deployment is achieving long-term catalytic stability.

Purpose of the Study:

• To comprehensively review the key factors influencing CO2RR stability.
• To examine catalyst degradation mechanisms and propose improvement strategies.
• To highlight advancements in electrode design and operational conditions for enhanced stability.

Main Methods:

• Review of literature on catalyst design, including doping, alloying, and substrate engineering.
• Analysis of electrode architecture modifications and membrane enhancements.
• Examination of operational parameters such as temperature, pressure, and electrolyte composition.

Main Results:

• Catalyst degradation occurs via valence changes, elemental dissolution, structural reconfiguration, and active site poisoning.
• Strategies like doping, alloying, and substrate engineering can improve catalyst stability.
• Electrode design and optimized operational conditions are crucial for extending CO2RR lifespan.

Conclusions:

• Understanding the determinants of CO2RR stability is essential for developing robust and scalable carbon dioxide conversion technologies.
• Addressing catalyst degradation and optimizing system components are critical for commercial viability.