掺氮碳基材料在费托合成反应中的应用

氮掺杂是一种对碳材料结构和性质进行修饰的重要方法。本文主要介绍了碳基材料掺氮的主要方法(即直接合成法和后处理法)及所得掺氮碳基材料的性质。重点综述了近年来掺氮碳基材料在制备费托合成钴基和铁基催化剂领域中的应用,进一步阐述了掺氮碳基材料作为新型费托合成催化剂载体所具有的主要优点:载体表面含氮基团具有锚定作用可提高金属活性组分分散度,同时,氮的掺杂不仅能够有效地提高催化剂还原度,而且富电子的氮物种可促进CO解离,从而有利于提高催化剂费托合成反应性能。在此基础上,本文也分析了掺氮碳基材料的合成和催化应用方面所存在的问题。

Application of nitrogen-doped carbon materials in Fischer-Tropsch synthesis reaction

Nitrogen doping is an important method for modifying structures and properties of the carbon materials. This paper introduces the synthetic methods (direct-synthesis and post-treatment method) and the properties of nitrogen-doped carbon-based materials. The recent application of the nitrogen-doped carbon-based materials in the research field relevant to the cobalt- and iron-based Fischer-Tropsch synthesis (FTS) catalysts is reviewed. As a new support used for the supported FTS catalyst, the prominent advantages of nitrogen-doped carbon-based materials are shown in detail. The nitrogen-containing groups on the support improve the dispersion of metallic component and the reducibility of catalyst. And the electron-rich nitrogen species also facilitates CO dissociation. These effects enhance the performance of the nitrogen-doped carbon supported catalyst in FTS reaction. In this paper, problems related to the synthesis and application of the nitrogen-doped carbon-based materials in the catalysis are also discussed.