Nitrogen-doped carbon species: a promising nonmetallic promoter for the Co/SiO2 Fischer-Tropsch synthesis catalyst

作者：Li, Shuo; Yao, Nan^*; Zhao, Fengdong; Li, Xiaonian^*

来源：Catalysis Science & Technology, 2016, 6(7): 2188-2194.

DOI：10.1039/c5cy00854a

• ORDERED MESOPOROUS CARBON
• SUPPORTED COBALT CATALYST
• CO ADSORPTION
• MODEL CATALYSTS
• IRON CATALYSTS
• CLEAN FUELS
• PORE-SIZE
• NANOTUBES
• STABILITY
• NITRIDES

A dicyandiamide (DCDA)-additive impregnation method was used to prepare SiO2 supported Co catalyst (i.e. Co/SiO2-CN). The addition of DCDA molecules could produce nitrogen-doped carbon species with predominant pyrrolic nitrogen atoms on the SiO2 support. The nitrogen-doped carbon species formed not only improved the reduction of Co3O4 particles, but also facilitated the electron transfer from the pyrrolic nitrogen atoms to neighboring metallic Co-0 particles during reduction on the Co/SiO2-CN catalyst, in contrast to the conventional impregnation derived Co/SiO2-IWI sample. Such an effect ameliorated the electron-deficient state of metallic Co-0 particles that existed on the Co/SiO2-IWI catalyst and was favorable to CO dissociation. As a result, the DCDA-additive method derived Co/SiO2 shows a higher turnover frequency value than the conventional Co/SiO2-IWI catalyst in the Fischer-Tropsch synthesis reaction.

• 出版日期2016
• 单位浙江工业大学