Fig. 5

(a) CV curves of Gr, E-rGO, and E-rGO/Fe3O4 and (b) Nyquist plots of the Gr, E-rGO, and E-rGO/Fe3O4NCs and the corresponding Rs and Rct values.
(a) CV curves of Gr, E-rGO, and E-rGO/Fe3O4 and (b) Nyquist plots of the Gr, E-rGO, and E-rGO/Fe3O4NCs and the corresponding Rs and Rct values.