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. 2019 Apr 1;6(10):1900119. doi: 10.1002/advs.201900119

Figure 3.

Figure 3

HER activities of chemically doped graphene with edge structures. a) Hydrodynamic voltammograms of graphene samples with and without edges in 0.5 m aqueous H2SO4 electrolyte. b) Tafel plots of the various graphene samples. c) Differences in current (ΔJ =J aJ c) at 150 mV (V vs RHE) as functions of scan rate. d) Gibbs free energy profiles calculated by DFT.