Figure 3

(A) Micro-Raman spectra, (B) their expanded views of high wavenumber region and (C) Co K-edge XANES spectra and their expanded views near edge jump for (a) Co₃O₄, (b) G-O, (c) rG-O, (d) N-doped rG-O, (e) CCG0, (f) CCG5, (g) CCG10 and (h) CCG20.