With the continuous increase of global greenhouse gas emissions, the resource utilization of

carbon dioxide (CO2)has gradually become a research hotspot for environmental protection

and sustainable energy development. The conversion of CO2 into high-value liquid fuels (such

as ethanol) through electrochemical reduction has significant scientific significance and

application value. Ethanol is an ideal renewable energy carrier due to its high energy density

and excellent storage and transportation performance.However, CO2 molecules have high

chemical inertness,complex electron transfer processes, and intense competition in reduction

pathways, making the development of efficient and selective catalysts a core challenge in this

field. Copper based catalysts have become a key material for achieving selective generation of

multi carbon (C2+) products due to their unique d-orbital electronic structure and moderate Co

adsorption energy. Early studies have shown that bare copper electrodes can catalyze the

generation of various carbon based products in CO2 reduction reactions (CO2RR),but their

selectivity and Faraday efficiency are relatively low. Next, we will develop a new type of copper

based catalyst material, optimize its crystal surface exposure and defect distribution to enhance

activity and regulate the surface structure and electronic state of the material. We will also

explore the regulation strategies of electrolyte composition and electrode interface engineering,

optimize reaction conditions to achieve higher ethanol yield.