Co/N-doped carbon composites from cobalt-coordinated porous organic polyamines for catalytic reduction of organic dyes

In this article, the nitrogen-rich organic porous polyamine (PPM) was synthesized by polycondensation of 2,6-pyridinedicarboxaldehyde and melamine under thermal conditions. The synthesized PPM has a high surface area, porosity, and abundant amine groups, especially pyridinic-N and triazine-N. The nitrogen-rich PPM facilitates Co/N coordination between the N species and Co ions, which can be used to load and stabilize cobalt ions. Then, Co/N-doped carbon composites (Co/N-CC) were obtained via pyrolysis of Co-PPM. Cobalt is well dispersed in Co/N-CC, and no obvious aggregation is observed. An improved catalytic activity was demonstrated by the Co/N-CC in the reduction of organic dyes and nitrobenzene compounds.