Under the background of"carbon dioxide emissions peaking and carbon neutrality",the CO2 capture,storage and utilization technologies have become a highlight research topic.CO2 hydrogenation to ethanol is an effective way to convert CO2 into high-value chemicals or fuels.In recent years,the hydrogenation of CO2 to ethanol has made many great breakthroughs.Because of the stable chemical properties of CO2 and the subsequent complex chain growth process,the selectivity of ethanol is low and many by-products are generated.Herein,the research progress in hydrogenation of CO2 to ethanol is reviewed,along with the corresponding noble metal-based catalysts,transition metal-based catalysts,tandem catalysts,metal-organic frameworks catalysts,supported catalysts,metal-carbide catalysts and zeolite catalysts.The reaction mechanism of CO2 hydrogenation to ethanol is also described.
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