Advancements and Challenges in Carbonate Electrocatalytic Reduction

Area of Science:

• Electrochemistry
• Catalysis
• Carbon Capture and Utilization

Background:

• Bicarbonate electrochemical reduction (BER) is a promising CO2 conversion pathway, but faces challenges in catalyst development and systematic strategies.
• Current methods are limited by gaseous feed constraints, necessitating solutions using capture-derived liquids.

Purpose of the Study:

• To provide a comprehensive review of BER breakthroughs, covering fundamental mechanisms and recent advancements.
• To guide the development of scalable and sustainable BER technologies by bridging fundamental science and practical application.

Main Methods:

• Examination of catalyst design strategies including morphology, composition, and coordination for enhanced product selectivity.
• Evaluation of electrolyte engineering and membrane selection impacts on reactor stability and mass transport.
• Technoeconomic analysis of integrated capture-and-conversion processes to assess commercial viability.

Main Results:

• Catalyst design and electrolyte engineering are crucial for optimizing BER performance and selectivity.
• Reactor stability and mass transport are significantly influenced by electrolyte choice and membrane selection.
• Technoeconomic analysis identifies key cost drivers for competitive BER systems.

Conclusions:

• BER technologies hold significant potential for sustainable carbon utilization, but require further advancements in catalyst and system design.
• Future research should focus on in situ diagnostics and integration with renewable energy sources for enhanced scalability and economic feasibility.
• This review provides a roadmap for developing efficient and cost-effective BER systems for industrial application.