Strong effect-correlated electrochemical CO₂ reduction

Area of Science:

• Electrochemistry
• Materials Science
• Chemical Engineering

Background:

• Electrochemical CO2 reduction (ECR) offers a sustainable route to convert CO2 into valuable fuels, mitigating climate change and fossil fuel dependency.
• Significant challenges remain, including high energy barriers, slow kinetics, low conversion rates, poor product selectivity, and catalyst instability, hindering industrial application.

Purpose of the Study:

• To provide a comprehensive review of factors influencing ECR performance.
• To elucidate the effect-performance relationships and underlying mechanisms for enhanced ECR.
• To identify challenges and future research directions for advancing ECR technology.

Main Methods:

• Comparative summary and in-depth discussion of various influencing factors.
• Analysis of intrinsic material effects (size, shape, composition, defects, interfaces, ligands).
• Examination of structure-induced effects (confinement, strain, fields), electrolyte effects (solutes, solvents, ions), and environmental effects (ionomers, pressure, temperature, impurities, flow rates).

Main Results:

• Intrinsic material properties significantly affect ECR activity and selectivity.
• Structural modifications, electrolyte composition, and environmental conditions play crucial roles in optimizing ECR performance.
• Understanding these multifaceted effects is key to improving ECR efficiency and selectivity.

Conclusions:

• A systematic understanding of material, structural, electrolyte, and environmental effects is essential for advancing ECR.
• Future research should leverage high-throughput calculations and in situ/operando techniques to uncover fundamental mechanisms.
• Addressing these factors will accelerate the industrial application of ECR for sustainable fuel production.