The performance of polymer electrolyte fuel cells (PEMFC) is strongly dependent on the diffusion rate of hydrogen and the electron mobility, which in turn is strongly influenced by the porous carbons, which are used as catalyst supports in PEMFC. We propose to perform quasi-elastic neutron scattering measurements to characterize hydrogen diffusion in nitrogen doped porous carbons (N-PC), which we have synthesized using polyaniline as nitrogen containing carbon source. Compared to commercial activated carbon, our porous carbons generally present higher surface area and lower amount or absence of micropores, which is an advantage for metal dispersion and improves diffusivity of reactants and products.