Fig. 2: Electrocatalytic performance towards OER. | Nature Communications

Fig. 2: Electrocatalytic performance towards OER.

From: Site-specific metal-support interaction to switch the activity of Ir single atoms for oxygen evolution reaction

Fig. 2

a ECSA-normalized polarization curves of Ni LDH, Ir1/Ni LDH-V, and Ir1/Ni LDH-T in 1.0 M KOH. b Overpotentials of different catalysts at the current density of 1 mA cm−2, respectively. c The ECSA-normalized current density at an overpotential of 300 mV for Ir1/Ni LDH-T, Ir1/Ni LDH-V, and Ni LDH, respectively. d Tafel slopes of Ni LDH, Ir1/Ni LDH-V, and Ir1/Ni LDH-T. e Electrochemical impedance spectra of Ni LDH, Ir1/Ni LDH-V, and Ir1/Ni LDH-T at 1.57 V vs. RHE. The Rct values for Ni LDH, Ir1/Ni LDH-V, and Ir1/Ni LDH-T were 90.7 ± 1.5, 26.6 ± 0.1, and 8.2 ± 0.2 Ω, respectively. f Chronopotentiometric curves of Ir1/Ni LDH-T towards OER at 10, 20, and 50 mA cm−2 for 20 h, respectively.

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