The Fischer-Tropsch (FT) synthesis, as an alternative route to produce high-quality liquid fuels and chemicals, has received considerable attention in recent years. In this work, a nano-sized capsule catalyst (ZrO₂@FeCu) with ZrO₂ as a core and FeCu bimetallic oxide as a shell was fabricated by urea hydrolysis method. For comparison, FeCu@ZrO₂ capsule catalyst was synthesized by the sequential precipitation method. FeCu + ZrO₂ reference catalyst was obtained by physically mixing of FeCu and ZrO₂ samples. Besides, these catalysts with potassium (K) modification were realized by wetness impregnation method, and the catalysts are denoted as ZrO₂@FeCu-K, FeCu@ZrO₂-K, and FeCu + ZrO₂-K, respectively. The structure-function relationship of the obtained catalysts was systematically clarified by means of a series of characterization techniques, such as BET, XRD, H₂-TPR, CO-TPD, XPS, SEM and EDS mapping. Among these catalysts after reduction, ZrO₂@FeCu-K exhibited the most excellent catalytic performance with 97 % CO conversion and 49 % α-olefins selectivity by promoted CO adsorption.

费-托合成（FT）作为生产高质量液体燃料和化学品的替代途径，近年来受到了相当大的关注。在这项工作中，通过尿素水解法制备了以ZrO ₂为核，FeCu双金属氧化物为壳的纳米级胶囊催化剂（ZrO ₂ @FeCu）。为了比较，采用连续沉淀法合成了FeCu @ ZrO ₂胶囊催化剂。通过将FeCu和ZrO ₂样品物理混合获得FeCu + ZrO ₂参比催化剂。此外，这些钾（K）改性的催化剂是通过湿法浸渍法实现的，分别表示为ZrO ₂ @ FeCu-K，FeCu @ ZrO _2。-K和FeCu + ZrO ₂ -K。借助一系列表征技术，如BET，XRD，H ₂ -TPR，CO-TPD，XPS，SEM和EDS作图，系统地阐明了所获得催化剂的结构-功能关系。在还原后的这些催化剂中，ZrO ₂ @ FeCu-K表现出最优异的催化性能，具有97％的CO转化率和49％的α-烯烃选择性（通过促进CO吸附）。