In this study the outer surface of porous hollow carbon spheres (HCSs) materials were functionalized by N-doping using a post-synthesis method and they were used as a Fischer-Tropsch catalyst support. Melamine was used as the nitrogen source, and carbonization was performed at different temperatures (600 and 900 °C) to introduce variable levels of N into the HCSs, with different bonding configurations. This procedure allowed for the incorporation of up to 13% N. Our results show that post-synthesis N-doping introduced marginal defects into the carbon framework and this did not affect the thermal stability of the materials. XPS studies revealed that the surface content on these materials varied and provided evidence for temperature-tunable bonding configurations. Effects associated with post-synthesis N-doping were apparent on the Co catalyst (˜10 wt.%) properties such as the inhibited reduction caused by a metal-support interaction observed by the H₂-TPR and in situ PXRD techniques. As a consequence the Fischer-Tropsch performance was influenced as both the activity and stability were improved on the catalysts supported on the N-doped materials. TEM analysis of the spent catalysts demonstrated the influence of N-doping on the sintering characteristics of Co, with particles > 30 nm measured on the N-free catalyst while N-doped samples had sizes < 15 nm.

在这项研究中，使用后合成方法通过N掺杂对多孔空心碳球（HCSs）材料的外表面进行功能化，并将其用作费-托催化剂载体。将三聚氰胺用作氮源，并在不同的温度（600和900°C）下进行碳化，以不同的键合结构将可变含量的N引入HCS中。此程序允许掺入高达13％的N。我们的结果表明，合成后的N掺杂将边缘缺陷引入碳骨架中，这不会影响材料的热稳定性。XPS研究表明，这些材料的表面含量各不相同，并为温度可调的键合结构提供了证据。_2- TPR和原位PXRD技术。结果，费托性能受到影响，因为负载在N掺杂材料上的催化剂的活性和稳定性均得到改善。废催化剂的TEM分析表明，N掺杂对Co烧结特性的影响，在无N催化剂上测得的颗粒大于30 nm，而N掺杂的样品尺寸小于15 nm。