Fig. 7: Electrochemical OER performance in PEM device under various operating conditions. | Nature Communications

Fig. 7: Electrochemical OER performance in PEM device under various operating conditions.

From: Single-faceted IrO2 monolayer enabling high-performing proton exchange membrane water electrolysis beyond 10,000 h stability at 1.5 A cm-2

Fig. 7: Electrochemical OER performance in PEM device under various operating conditions.

a Schematic diagram of the PEM cell. H (yellow), O (red). b Cell voltage (Ecell) with respect to the current density with the anode loading of 1.5 mgIr cmgeo-2 and the cathode loading of 0.3 mgPt cmgeo-2. Inset shows I-V curves of IrO2(101) monolayer and Comm IrO2(Umicore) with a low anode/cathode loading of 0.2 mgIr/Pt cmgeo-2. c Electrolysis durability test of IrO2(101) monolayer with low Ir loading under simulated fluctuating conditions. d Electrolysis durability test of low-Ir-loading MEAs at a constant 1.5 A cm-2. e Comparison of PEM performance in this work with those in previous studies. f Electrolysis durability test of IrO2(101) monolayer under steady-state condition, which achieves over 10,000 h OER stability at a constant 1.5 A cm-2. PEM devices were carried out at 80 °C and ambient pressure.

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