fig7

Figure 7. (A-C) Elemental mapping of Ru₁-Pt₃Cu with atomic resolution; (D) the corresponding schematic atom model; (E) overpotential for the catalysts to reach 0.1 and 10 mA·cm^-2; (F) chronopotentiometric tests for Ru₁-Pt₃Cu and RuO₂ at 10 mA·cm^-2; (G) calculated volcano plot for the OER overpotential. Figures are quoted with permission from ref^[31], Copyright 2019, Springer Nature; (H) The calculated profiles for the free energy during OER over different catalyst surfaces. Figures are quoted with permission from ref^[34], Copyright 2020, Royal Society of Chemistry. OER: Oxygen evolution reaction.