Fig. 1: HER performance and structural characterizations of NiS catalyst before and after measurement. | Nature Communications

Fig. 1: HER performance and structural characterizations of NiS catalyst before and after measurement.

From: Dynamic restructuring of nickel sulfides for electrocatalytic hydrogen evolution reaction

Fig. 1: HER performance and structural characterizations of NiS catalyst before and after measurement.The alternative text for this image may have been generated using AI.

a XRD patterns of the as-synthesized NiS and NiS after HER measurement (marked as NiS-40). b Ni 2p XPS spectra for NiS and NiS after HER measurement (marked as NiS-40), along with NiO and Ni3S2 as reference. c iR-corrected Linear sweep voltammetry (LSV) polarization curves of as-synthesized NiS, NiS-10, NiS-20, NiS-30, NiS-40, and NiS-50 samples measured in 1 M KOH solution. NiS-10, NiS-20, NiS-30, NiS-40, and NiS-50 are NiS samples after 10, 20, 30, 40, and 50 minute chronoamperometry measurements at −1.00 V vs. RHE, respectively. d The large-area TEM image, e high-resolution TEM image (the right panel shows the FFT images of both regions) and f the corresponding elemental mapping of the NiS-40 sample after conducting 25-h chronopotentiometric measurement at a current density of 200 mA cm−2.

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