近日，武汉大学定明月团队研究了量身定制的铁催化剂微环境，可高效合成气转化为烯烃，二氧化碳排放量低。这一研究成果发表在2025年7月23日出版的《科学通报》杂志上。

在铁基催化剂上实现高效合成气转化为烯烃是有希望的，但由于费托反应（FTO）和水气转换（WGS）反应的双重共存，仍然是一个很大的挑战。

研究组制定了一种策略，通过调节铁催化剂的微环境和控制关键中间体的扩散行为，成功地实现了低二氧化碳排放的合成气转化为烯烃。他们制备了一种将Fe包裹在多孔碳中的Fe@C催化剂，该催化剂同时具有高的单次烯烃收率（30%）和低的CO₂选择性（20%左右），在目前报道的先进的氧化沸石、Co基和Fe基催化剂中名列前茅。一系列实验和理论结果表明，独特的微环境可以富集烯烃，抑制加氢反应，有利于高附加值烯烃的生成。此外，由于H₂O分子的加速扩散，即使在CO转化率高的情况下，WGS的副反应也被明显抑制。他们的研究提出了一种新的催化剂设计策略，以实现合成气转化过程中高效可控的催化。

附：英文原文

Title: Tailored Fe catalyst microenvironment for highly efficient syngas conversion to olefins with low CO2 emissions

Author: Di Xu a , Riguang Zhang b, Mingyue Ding a

Issue&Volume: 2025/07/23

Abstract: Achieving highly efficient syngas conversion to olefins on the Fe-based catalysts is promising, but remains a big challenge due to the twin coexistence of the Fischer–Tropsch to olefins (FTO) and water gas shift (WGS) reactions. Herein, we developed a strategy via regulating the microenvironment of Fe catalyst and controlling the diffusion behaviors of critical intermediates to successfully realize the syngas conversion to olefins with low CO2 emission. A Fe@C catalyst with Fe species encapsulated in porous carbon was fabricated and achieved high single-pass olefins yield (>30%) and low CO2 selectivity (around 20%) simultaneously, which has ranked the top among the ever-reported advanced oxide–zeolite, Co-based, and Fe-based catalysts. A series of experimental and theoretical results revealed that the unique microenvironment could enrich olefins and inhibit hydrogenation reaction, therefore favoring high value-added olefins formation. Moreover, due to the accelerated diffusion of H2O molecules, the WGS side reaction was obviously inhibited even at high CO conversion. Our research presented a new catalyst design strategy to realize highly efficient and controllable catalysis in syngas conversion.

DOI: 10.1016/j.scib.2025.07.032

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927325007571