Cu-Fe Prussian analogue synthesized is used as precursor to prepare nano copper catalysts particles through pyrolysis,reduction and iron removal.The influences of pyrolysis temperature(250℃ and 400℃)on the properties and catalytic effect of the catalysts are systematically studied.It is discovered that the lower pyrolysis temperature leads to more carbon and nitrogen residues in CuFe-250,and further leads to different catalytic effects.Compared to CuFe-250,CuFe-400 delivers higher selectivity for ethylene and carbon monoxide,of which the peak Faraday efficiency is 52％for ethylene.Mechanistic analysis shows that the three-phase interface structure affected by the catalyst has a key impact on the selectivity of products during CO2 electrocatalysis.
关键词
二氧化碳电催化还原/类普鲁士物/铜基催化剂/多碳产物
Key words
CO2 electrochemical reduction/Prussian analogue/copper-based catalyst/multi-carbon products
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