Fig. 4: Electrochemical performance of HEA electrocatalysts. | Nature Communications

Fig. 4: Electrochemical performance of HEA electrocatalysts.

From: Unraveling the electronegativity-dominated intermediate adsorption on high-entropy alloy electrocatalysts

Fig. 4

a HER polarization curves, b the corresponding histogram for overpotentials at 100 mA cm–2 and Tafel slopes obtained for Ru/CNFs, FeCoNi/CNFs, FeCoNiMn/CNFs, FeCoNiRu/CNFs, FeCoNiMnRu/CNFs, and Pt/C in 1.0 M KOH electrolyte. c ECSA-normalized HER polarization curves of the as-prepared electrocatalysts. d OER polarization curves for the as-prepared electrocatalysts, commercial RuO2 and IrO2 in 1.0 M KOH electrolyte. e Comparison of HER and OER overpotentials at 10 mA cm–2 in 1.0 M KOH for different catalysts. Those recently reported literatures for HER and OER electrocatalysts were shown in Supplementary Tables 6 and 7. f Polarization curves for full water splitting by the as-prepared electrocatalysts in a two-electrode configuration at a scan rate of 2 mV s–1. g Long-term stability measurement of the FeCoNiMnRu/CNFs electrode at −1.16 V vs. RHE in 1 M KOH electrolyte for 600 h. The insets in (g) are the XRD patterns (left) and STEM-EDS mapping images (right) of FeCoNiMnRu/CNFs after the long-term stability test.

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