fig3

Figure 3. Electrochemical performance of HER and OER. (A) LSV curves; (B) Overpotentials; (C) Tafel plots; (D) EIS spectra; (E) C_dl values of Cu-MoS₂ and control catalysts for HER; (F) Chronopotentiometric curve of Cu-MoS₂ at 500 mA cm^-2 for 100 h; (G) LSV curves; (H) Overpotentials; (I) Tafel plots; (J) EIS spectra; (K) C_dl values of CuO-MoS₂/MoO₃ and control catalysts for OER; (L) Chronopotentiometric curve of CuO-MoS₂/MoO₃ at 500 mA cm^-2 for 100 h.