为解决传统碳源结构固定、不能与过渡金属配位，从而导致石墨化碳包裹过渡金属材料的结构难以调控问题，以官能团可修饰的木质素为碳源，通过表面修饰并采用水热-炭化两步法制备了孔隙结构发达、颗粒尺寸较小、石墨化程度较高的石墨化碳包裹铁纳米材料，在费托合成中表现出优越的催化活性，其CO转化率达83.5%，低碳烯烃选择性最高可达53.5%。

Traditional carbon source has a fixed structure and cannot coordinate with transition metals,which causes that the structure of the graphitic carbon coated transition metal material is difficult to control.In order to solve this problem,lignin with modifiable functional group is used as ideal carbon source.Graphitic carbon coated iron nanomaterials with well-developed pore structure,small particle size and high degree of graphitization are prepared through surface modification method and hydrothermal-carbonization two-step method.It exhibits superior catalytic activity in Fischer-Tropsch synthesis in which carbon monoxide conversion rate reaches 83.5% and the lower-carbon olefin C₂-C₄ selectivity can reach up to 53.5%.