Fig. 4: Calculated Pourbaix diagram and Pourbaix decomposition free energy ΔGpbx of OER catalysts in acid. | npj Computational Materials

Fig. 4: Calculated Pourbaix diagram and Pourbaix decomposition free energy ΔGpbx of OER catalysts in acid.

From: Predicting aqueous stability of solid with computed Pourbaix diagram using SCAN functional

Fig. 4

a, c Ir and Ru Pourbaix diagram generated with aqueous ion concentrations 10−6 M at 25 °C, respectively. b, d Pourbaix decomposition free energy ΔGpbx of IrO2 and RuO2 from the potential 0–2.0 V, respectively. The projection of ΔGpbx onto the potential axis highlights the stable species at the corresponding regions.

Back to article page