以合成的铜铁类普鲁士物为前驱体，通过热解、还原及脱铁法制备了纳米铜催化剂颗粒，系统研究了热解温度（250、400℃）对催化剂性质及催化效果的影响。结果表明，较低的热解温度导致CuFe-250含有更多碳氮元素残留，并导致了不同的催化效果。与CuFe-250相比，CuFe-400拥有更高的乙烯和一氧化碳选择性，其中乙烯的法拉第效率峰值可达52%。机理分析结果表明，在二氧化碳电催化过程中，受催化剂影响的三相界面结构对产物的选择性具有关键的影响。

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.

李晶正(1998-),男,硕士生,研究方向为二氧化碳电催化还原,codylostral@gmail.com