Research progress on copper-based catalysts for electrochemical reduction of carbon dioxide to formic acid
The electrochemical reduction of carbon dioxide(ECO2RR)presents a significant value for carbon neutrality by preparing high-energy chemicals or fuels from renewable energy.Particularly,ECO2RR using copper-based catalysts,with their advantages of low cost and excellent catalytic activity,has emerged as the most promising strategy.In this paper,the research progress of copper-based catalysts in the preparation of formic acid in recent years is comprehensively summarized.The adjusting strategies of ECO2RR to formic acid include morphology,surface valence,alloying,crystal plane effect,vacancy and carbon carrier.The effects of the number of active sites and the formation of key intermediate *OCHO on the selectivity of formic acid products are discussed.Finally,the challenges faced in this field and the prospects from the perspectives of in-situ characterization,scientific calculation and reaction condition optimization are summarized.
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