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(a) Comparison of polarization curves of NiFe alloy between 1st and 1000th CV cycles in N2−saturated 1 M KOH at a scan rate of 5 mV s−1. (b) The corresponding magnified curve from 1.49 to 1.57 V versus an RHE. (c) Chronopotentiometry curves of the NiFe alloy in 1 M KOH at 1.65 V versus an RHE at a current density of 10 mA cm−2. (Reprinted with permission from Ref. [70], Copyright 2020, Catalysis Today-Elsevier).
