Our calculated value of E A = 99 meV is very low compared with typical values for Nafion and not much higher than the barrier estimated for 1-D graphanol of 60 meV. It is informative to compare the predicted performance of graphanol with other proton conduction materials. We sourced PT activation energies and proton conductivities of several materials from a review paper by Karimi et al. We plot comparisons of these values in Figure and. Details for each material are given in Table . We note that the results are all experimen- tal except for our predictions for graphanol. We report the activation energies for six classes of materials: Nafion, polybenzimidazole (PBI), chitosan (CS), poly(ether sulfone) (PES), sulfonated poly(ether ether ketone) (SPEEK) and polysulfone (PS). Support-like reinforcements and the use of acidic media are required to facilitate anhydrous proton conduction in some of these materials because they are not intrinsic proton conductors. Graphanol (GOH-2D) has a lower proton hopping activation energy than almost all other materials and is comparable to composite SPEEK with reinforced fluoropolymers and functionalized PS.