Abstract：The methods of controlling nitrogen species in nitrogen doped carbon materials were introduced. The nitrogen content could be regulated by changing the amounts and types of nitrogen sources, and the calcination temperature. The nitrogen types could be regulated by in situ synthesis, post treatment and changing reaction conditions(mainly the calcination temperature and calcination time). The nitrogen doped carbon materials prepared by in situ synthesis and post treatment were mainly graphitic nitrogen and pyridinic nitrogen. With the increase of calcination temperature and the extension of calcination time, the nitrogen content was gradually reduced, and the proportion of graphitic nitrogen increased. With respect to the applications of nitrogen doped carbon materials (N-C) used as supports for Pd catalysts (Pd/N-C) in the direct hydrogenation and liquid phase hydrodechlorination reactions, the article described that nitrogen doped carbon supports improved their hydrogenation performance through their own properties and their anchoring effect on Pd and electronic effects. Comprehensive analysis found that nitrogen-doped carbon carriers enhanced the interactions among Pd/N-C catalysts, solvent and reactants. The anchoring effect on Pd was strengthened, the dispersion and stability of Pd/N-C catalysts were improved and the ratio of Pd0/Pd2+ was changed.
Xiang Meng,Xu Bin,Han Wenfeng et al. Regulation of Nitrogen Species in Nitrogen Doped Carbon Materials and Its Hydrogenation Application Used as Supports for Pd Catalysts[J]. 化学反应工程与工艺, 2018, 34(1): 73-82.
