Figure 4

Linear sweep voltammetry (LSV) curves of RGO, Ni, rGN6 and GN6 in 0.50 M H2SO4 solution (a) and in 0.50 M Na2SO4 solution of pH 10 (b). The insets are LSV curves of GN2, GN6 and GN8 composites.
Linear sweep voltammetry (LSV) curves of RGO, Ni, rGN6 and GN6 in 0.50 M H2SO4 solution (a) and in 0.50 M Na2SO4 solution of pH 10 (b). The insets are LSV curves of GN2, GN6 and GN8 composites.