Fig. 2: Comparison between Co-MOL@GO and Co-MOF.

a Co 2p XPS spectra of Co-MOL@GO (red) and Co-MOF (orange). b Raman spectra of Co-MOL@GO (red) and GO (black). c EIS spectra of Co-MOL@GO (red), GO (black), and Co-MOF (orange).

a Co 2p XPS spectra of Co-MOL@GO (red) and Co-MOF (orange). b Raman spectra of Co-MOL@GO (red) and GO (black). c EIS spectra of Co-MOL@GO (red), GO (black), and Co-MOF (orange).