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. 2016 Dec 27;4(3):1600380. doi: 10.1002/advs.201600380

Figure 1.

Figure 1

a) Schematic of the overpotentials associated with oxygen electrocatalysis (OER, ORR) and hydrogen electrocatalysis (HER, HOR). Reproduced with permission.18 Copyright 2015, Royal Society of Chemistry. b) A volcano plot of experimentally measured exchange current density as a function of the DFT‐calculated Gibbs free energy of adsorbed atomic hydrogen. Reproduced with permission.6 Copyright 2014, Royal Society of Chemistry. c) Tafel plots for anodic and cathodic branches of the current‐overpotential curve, with α = 0.5, T = 298 K, and j0 = 10–6 A cm–2. Reproduced with permission.[16]