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. 2017 Dec 7;4(1):112–119. doi: 10.1021/acscentsci.7b00502

Figure 4.

Figure 4

(A) The LSV curves for NiO@Ni/WS2/CC, WS2/CC, Pt/C/CC, and NiO@Ni/CC with a scan rate of 5 mV s–1 for HER. (B) The corresponding Tafel plots. (C) LSV curves for NiO@Ni/WS2/CC initially, after 500 and 1000 CV cycles. (D) Potentiostatic electrolysis of NiO@Ni/WS2/CC for 40 h with a scan rate of 5 mV s–1.