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Figure 5: (a) High-resolution N 1s spectra of PANI@PCN-224(Fe)-900. (b) Nitrogen configurations of PANI-900, PCN-224(Fe)-900 and PANI@PCN-224(Fe)-900. (c) Fe K-edge XANES spectra and (d) Fourier transform EXAFS of PANI@PCN-224(Fe)-900, PCN-224(Fe)-900, Fe foil, Fe-TPPCN, and Fe3C.