Figure 6

Fe 2p HXPES spectra. (a) FePc/PhRs and (b) HB-FePc catalysts. Solid, dashed, and dotted lines show the binding energies of Fe metal, Fe²⁺, and Fe³⁺, respectively. The arrows indicate satellite peaks of Fe₂O₃ 2p _3/2 and 2p _1/2, which emerge approximately 8 eV above pristine peaks [31]. In the spectrum of the FePc/PhRs precursor, a peak from In 3p _1/2 is observed.