fig4

Figure 4. (A) Current density and potential versus time plot for Pt monolayer deposition on 3D Ni foam using the sequential technique. (B) Mass and potential change during Pt monolayer deposition using QCM on Au-coated quartz crystal. (C) Voltammetry curve for Pt deposition on Au NF/Ni foam via pulsed potential waveform in 0.5 M NaCl and 3 mM K₂PtCl₄. (D) Illustration of Pt SED. Inset: SEM image of Ni foam. This figure is quoted with permission from Li et al.^[57]. FESEM images and EDS mapping on Au/Ni/CF cloth: (E) Low-magnification and (F) Higher-magnification FESEM image. (G) EDS mapping of Ni in image (F). (H) EDS mapping of Au in image (F). This figure is quoted with permission from Pang et al.^[58]. (I) High-magnification FESEM image of Pt ML on Au/Ni/CFP. (J) Lower-magnification FESEM image of Au/Ni/CFP. (K) EDS mapping of Ni corresponding to image (J). (L) EDS mapping of Au corresponding to image (J). This figure is quoted with permission from Pang et al.^[59]. (M) CV curve of Au/CP, acquired at 10 mV s^-1 and 70 °C in N₂-purged 3 mM K₃IrCl₆ and 500 mM Na₂SO₄ (pH = 4.0). Insets showcase FESEM images of Ir on Au/CP deposited at different E_dep for 600 s. (n) H_UPD charge density and (n) Ratio of Ir 4f peak area to Au 4f peak area of Ir on Au/CP deposited at various E_dep for 600 s. Insets depict CV curves for (M) and XPS profiles for (O). This figure is quoted with permission from Kim et al.^[51].