Fig. 2. Low-magnification SEM images.
(A) Bare carbon fiber cloth. (B) NiSx/C. (C) Ni-Mo-S/C (3:1). (D) Ni-Mo-S/C (1:1). (E) Ni-Mo-S/C (1:3). (F) MoS2/C. All scale bars, 2 μm.
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