Fig. 3: Electrocatalytic OER properties of electrocatalysts in 0.1 M HClO4 (pH = 1). | Nature Communications

Fig. 3: Electrocatalytic OER properties of electrocatalysts in 0.1 M HClO4 (pH = 1).

From: Tensile straining of iridium sites in manganese oxides for proton-exchange membrane water electrolysers

Fig. 3

a Linear sweep voltammetry (LSV) curves, b overpotentials at 10 and 200 mA cm−2 (error bars are the standard deviations of three replicate calculation). The loading of catalysts is 0.25 mg cm−2, and the solution resistance is 2.2 Ω. c Tafel slopes, and d OER polarization curves based on electrochemical surface area (ECSA) for TS–Ir/MnO2, Ir–MnO2, MnO2, and IrO2 supported on carbon cloths. e Mass activity and turnover frequency (TOF) at overpotentials of 198 and 260 mV for TS–Ir/MnO2, Ir–MnO2, and IrO2. Error bars are the standard deviations of three replicate calculation. f OER stability tests and constant S-numbers calculated at a constant potential of 1.60 V (driving a current density of 200 mA cm−2) for TS–Ir/MnO2.

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