Exploring the structure of iron-based catalysts on the catalytic performance of Fischer-Tropsch synthesis (FTS) reaction has attracted much attention. With this in mind, the mixture of SiO₂ or Al₂O₃ powder and non-porous iron oxide powder (α-Fe₂O₃) have been investigated for understanding the nature role of different iron carbides in the FTS reaction by adjusting the formation of iron carbides. Under the typical FTS reaction conditions, the CO conversion of Al₂O₃/α-Fe₂O₃ = 1 catalyst could reach up to 61.6 %, which is about 3.3 times that of the pure α-Fe₂O₃ catalyst. Based on the characterization results, including in situ XPS and CO-DRIFTS as well as Mössbauer spectra, it is found that the electronic state of iron atoms is affected by the existence of SiO₂ or Al₂O₃, and the interactions of Fe-Si or Fe-Al are formed on the surface of iron powder, which plays an important role in formation of C-rich iron carbide active phase (ε-Fe₂C). Although χ-Fe₅C₂ is usually as the active phase in the FTS reaction, we have found that the content of ε-Fe₂C is more positive to activity.

在费-托合成（FTS）反应的催化性能上探索铁基催化剂的结构引起了广泛的关注。考虑到这一点，二氧化硅的混合物₂或Al ₂ ö ₃粉末和非多孔质铁氧化物粉末（的α-Fe ₂ ö ₃）已被研究用于通过调节理解在FTS反应不同铁碳化物的性质的作用碳化铁的形成。下的典型的FTS反应条件下，Al的CO转化率₂ ö ₃ /的α-Fe ₂ ö ₃  = 1催化剂可能达到高达61.6％，大约是3.3倍，该纯的的α-Fe ₂ ö ₃催化剂。根据表征结果，包括原位XPS和CO-DRIFTS以及Mössbauer光谱，发现铁原子的电子状态受SiO ₂或Al ₂ O ₃的存在以及Fe-的相互作用的影响。在铁粉表面形成Si或Fe-Al，这在富C碳化铁活性相（ε -Fe ₂ C）的形成中起着重要作用。虽然χ -铁₅ c ^ ₂通常是如在FTS反应活性相，我们已经发现的内容ε -Fe ₂ C更积极的活性。