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3D overpotential heatmaps (volcanoes) for (a) ORR, (b) OER, and (c) bifunctional overpotentials. Using colored points as a reference, the pore radius of the CoCo model is respectively ∞, 8.5, 8.0, 6.0, and 4.0 Å from left to right. The volcano tops (η = 0 V) are marked with a dot at the crossing of thin dotted lines. Plot with Bayesian error estimation is shown in Figure S5.
