Fig. 2: EA operation in half-cell systems. | Nature Communications

Fig. 2: EA operation in half-cell systems.

From: Dynamic polarization control of Ni electrodes for sustainable and scalable water electrolysis under alkaline conditions

Fig. 2: EA operation in half-cell systems.

a EA conditions for half-cell systems. b iR-corrected potential traces of NF at 0.5 A cm–2 with and w/o EA operation in a 1 M KOH solution. Data were collected at 10 min intervals during 1 h application of 0.5 A cm–2, and at 1 min intervals during 3 min application of a reductive activating potential. The black arrow in (b) indicates the sequence of this data collection. c Overpotential difference before (η0h) and after (η50h) 50 h of EA operation with varying reductive activating potentials. d iR-corrected CV scans of NF at the initial state, after 50 h of normal OER operation, and after 50 h of EA operation with a scan rate of 20 mV s–1. e In situ Raman spectra of NF at 1.7 VRHE at the initial state, after 50 h of normal OER operation, and after 50 h of EA operation. f In situ Raman spectra of NF over time at 0.6 VRHE after 50 h of EA operation. Error bars indicate standard errors obtained from 3 or more independent replicates.

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