Fig. 4: Quasi in situ alkaline HER measurements for W-ACs treated at different applied potentials. | Nature Communications

Fig. 4: Quasi in situ alkaline HER measurements for W-ACs treated at different applied potentials.

From: Thermal migration towards constructing W-W dual-sites for boosted alkaline hydrogen evolution reaction

Fig. 4

a Schematic illustration of the quasi in situ alkaline HER experimental setup, where WE, RE, and CE represent the working, reference and counter electrodes, respectively. b W 4 f and (c) O 1 s core-level XPS spectra of W-ACs treated at 0.00, –0.02, –0.04, and –0.06 V versus RHE and soaked in KOH solution, respectively. d The corresponding valence band of above treated W-AC samples. Inset shows the typical desorption of H* and OH* intermediates from W-W dual-sites.

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