fig2

Figure 2. Electrocatalytic hydrogen production. (A) Tafel slope, (B) electrochemical impedance spectra recorded at a biased potential of -160 mV vs. RHE, and (C) overpotentials of MoSe₂, CoP, and exfoliated colloidal MoSe₂/CoP nanosheets. Figure A-C are quoted with permission from Zhang et al.^[15]; (D) Schematic diagram of the fabrication process of the P-mAuRh film/NF, and (E) the corresponding current density of the prepared samples under different potentials. Figure D and E are quoted with permission from Zhang et al.^[17]; (F) Schematic representation of the synthesis mechanism of hollow porous PtIr nanobowls, and (G) the corresponding overpotentials of the prepared samples at different current densities. Figure F and G are quoted with permission from Zhang et al.^[18]. RHE: Reversible hydrogen electrode.