Progress and Perspective of Single-atom Catalysts for the Electrochemical CO2 Reduction Reaction for Fuels and Chemicals

Electrochemical CO2 Reduction Reaction (CO2RR) presents a transformative approach for the sustainable synthesis of fuels and chemicals to address pressing environmental challenges. The efficiency and selectivity of the CO2RR largely depend on the catalyst. Among which, Single-Atom Catalysts (SACs) have surfaced as a prominent design for this reaction, offering exceptional activity and selectivity. This paper delves into the progress and perspectives of SACs in CO2RR, tracing their historical evolution, unique advantages, and underlying mechanisms. The superior atomic utilization, distinct electronic configurations, and enhanced product specificity of SACs over traditional catalysts have opened novel pathways for more efficient conversion of CO2 to potent resources. However, challenges particularly concerning the stability, scalability, and product diversity of these catalysts constitutes as major impediments. Recent innovations, from advanced characterization techniques to novel synthesis methods, are spotlighted, showcasing the strides the scientific community has made. Looking forward, this paper underscores the potential of SACs in bridging sustainable energy sources with green chemical production and discuss prospective strategies to overcome existing limitations.