Features of electrochemical behavior of graphene films on metal foams

Figures & data

Figure 1. SEM images of graphene coatings on the Ni (a–c) and Cu (d–f) foams.

Figure 2. Electron spectroscopy of graphene coating on Ni substrate: a) XPS, b) EPES and c) REELS.

Figure 3. Cyclic voltammetric response of 3DGrNi (1) and 3DGrCu (2) electrodes in comparison to polished GC (3), 1 М solution Na₂SO₄ + 5 · 10⁻³ М [Ru(NH₃)₆]Cl₃, ν = 0.01 V/s. 4 – cyclic voltammetric response of 3DGrNi electrode in 1 М solution of Na₂SO₄.

Figure 4. Cyclic voltammetric response at variable scan rates for 3DGrNi (a) and 3DGrCu (b) electrodes. Subplots show dependencies of I_а и I_c vs. ν^0.5 (1 М solution Na₂SO₄ + 5 · 10⁻³ М [Ru(NH₃)₆]Cl₃).

Figure 5. Potential difference ΔE_р at different scan rates of 3DGrNi (1) and 3DGrCu (2) electrodes and polished GC (3).

Figure 6. Cyclic voltammogram of 3DGrCu electrode in 1 М Na₂SO₄ (1) solution with 8 · 10⁻³ М camphor (2), scan rate – 0.01 V/s.