Fig. 5: Electrochemical OER performance and pH dependency. | Nature Communications

Fig. 5: Electrochemical OER performance and pH dependency.

From: High-entropy alloy enables multi-path electron synergism and lattice oxygen activation for enhanced oxygen evolution activity

Fig. 5

a LSV curves of various catalysts in O2-saturated 1 M KOH solution at a scan rate of 5 mV s−1. b Tafel plots of different catalysts corresponding to Fig. 4a. c Comparison of overpotential at a current density of 10 mA cm-2 and Tafel slope for NiFeCoCrW0.2 and previously reported OER catalysts. d Chronopotentiometry curve obtained for NiCoFeCrW0.2 catalyst at a current density of 100 mA cm-2. The inset is an SEM image after the long-term test. e LSV curves measured in KOH solutions at different pH values (13.9, 13.4, 12.9), with a scan rate of 5 mV s−1. f Specific current density at 1.45 V versus RHE as a function of pH.

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