N-doping has been presumed as good phenomenon for optimizing the work function of graphene-based materials. The variation in the work function is due to the electron releasing or attracting tendency of each doped nitrogen. For instance, the work function of graphitic N is lower than that of pristine graphene (4.43 eV) while both pyridinic (4.83 eV) and hydrogenated pyridinic N are greater than that of pristine graphene as demonstrated by . reported that the work function of graphene prepared by CVD technique was decreased due to the doping of graphene by pyridinic N which could be attributed to the hydrogenation of pyridinic N . Currently, the N-doped graphene has been more focused towards spintronic applications because of its tendency to generate magnetic moment. Graphitic N is unable to create the magnetic moment as it does not have nonbonding electrons. Despite the fact that both pyrrolic and pyridinic N have got non-bonding pair of electrons, pyrrolic N alone exhibits Π and Π * states that giving rise to spin polarisation.