Electrochemical reduction of carbon dioxide is a crucial energy conversion protocol involving two significant processes: converting CO2, a greenhouse gas, into value-added products and reducing fossil fuel usage to produce fuels or chemical products. Moreover, the production of CO from the carbon dioxide reduction reaction is highly substantial since it is a twoproton/ electron reaction, and it also finds potential applications in chemical, metallurgical, and pharmaceutical industries. Among the various classes of electrocatalytic materials, single-atom catalysts have attracted great attention because of their high atom utilization. Here, we survey the recent research trends involved in the preparation of single atom-based electrocatalysts for the generation of carbon monoxide from the electroreduction of carbon dioxide.

Recent research trends in the rational designing of single atom catalysts for electrochemical CO2 reduction reaction to CO—a mini review
    Abstract
    1 Introduction
    2 Electroreduction of CO2 to CO
    3 Recent research trends in SAC for CO2RR to CO
        3.1 Nickel-based electrocatalysts for CO2RR to CO
        3.2 Non-nickel-based electrocatalysts for CO2RR to CO
        3.3 Theoretical exploration of single atom electrocatalysts for CO2RR to CO
    4 Summary and outlook
    Acknowledgements 
    References

• Jinuk Choi(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea)
• Seoyeon Yoo(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea)
• Gnanaprakasam Janani(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea)
• Subramani Surendran(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea)
• Sathyanarayanan Shanmugapriya(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea)
• Uk Sim(Hydrogen Energy Technology Laboratory, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanamdo 58330, Republic of Korea, Research Institute, NEEL Sciences, INC., Naju, Jeollanamdo 58326, Republic of Korea, Henan Key Laboratory of Function‑Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, People’s Republic of China) Corresponding author
• Heechae Choi(Department of Chemistry, Xi’an Jiaotong-Liverpool University, Suzhou 215123, People’s Republic of China)
• Gibum Kwon(Department of Mechanical Engineering, University of Kansas, Lawrence, KS 66045, USA)
• Kyoungsuk Jin(Department of Chemistry, Korea University, Seoul 02841, Republic of Korea)