Green Synthesis Of N-Graphene By Hydrothermal-Microwave Irradiation For Alkaline Fuel Cell Application

We demonstrate the synthesis of N-graphene via efficient hydrothermal-microwave irradiation method for oxygen reduction reaction (ORR). The high energetic uniform heating of microwave irradiation produces highly exfoliated nitrogen-doped graphene layers in shortest time. Notably, the nitrogen content of doped graphene has been evaluated ~6.86 at%. The synthesized N-graphene characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction and Raman spectroscopy. The electrochemical measurements of the catalysts were demonstrated excellent electrocatalytic activity for ORR in alkaline medium via 4-electron processes.