Nanostructured catalysts for CO₂ electroreduction: from product selectivity to scalable design

Area of Science:

• Electrochemistry
• Catalysis
• Sustainable Energy

Background:

• Electrochemical CO2 reduction (eCO2RR) is a promising sustainable technology for converting CO2 into valuable fuels and chemicals.
• Recent advancements in nanostructured catalysts and electrolyzer designs have significantly improved reaction performance metrics like activity, selectivity, and current density.

Purpose of the Study:

• To review recent progress in nanocatalyst design for product-selective eCO2RR.
• To outline key structure-property relationships crucial for advancing eCO2RR technology.
• To identify strategies for bridging the gap between laboratory findings and practical, scalable electrolysis.

Main Methods:

• Review of recent scientific literature on eCO2RR.
• Analysis of nanocatalyst design principles and their impact on selectivity.
• Evaluation of electrolyzer component stability and performance under high current density.

Main Results:

• Nanocatalyst design has shown significant improvements in activity and selectivity for eCO2RR.
• Key challenges remain, including CO2 activation, hydrogen evolution competition, catalyst degradation, and system management.
• Electrolyzer components like membranes and gas diffusion electrodes (GDEs) face stability issues.

Conclusions:

• Overcoming barriers like catalyst stability and efficient CO2 utilization is essential for commercializing eCO2RR.
• Further research into structure-property strategies for nanocatalysts is needed.
• Developing robust electrolyzer systems is critical for scalable and durable eCO2RR applications.