fig10

Figure 10. (A) Structure model of FeN₄-PN; (B)XPS N 1s spectra of FeN₄, FeN₄-PN, and FeN₄-GN. Adapted with permission^[66]. Copyright 2021, American Chemical Society; (C) Typical CVD procedures to synthesize the Fe(Fc)-N/S-C catalyst. Relative energy profiles for the ORR processes on (D) FeN₃S and (E) FeN₄; (F) Reaction scheme with the intermediates in the ORR process on FeN3S (O: red, C: gray, N: blue, Fe: orange, S: yellow, H: white). Adapted with permission^[75]. Copyright 2021, American Chemical Society; (G) Steps for the synthesis of the samples; SEM images of Fe-PNC at different scales; (H) Fe 2p XPS spectrum of Fe-PNC and Fe-NC; (I) P2p XPS spectrum of Fe-PNC; (J) Degradation performance of BPA in different catalytic systems; (K) The kobs values of BPA in different catalytic systems. Adapted with permission^[81]. Copyright 2024, Elsevier B.V. PN: Pyrrole type nitrogen; XPS: X-ray photoelectron spectroscopy; CVD: chemical vapor deposition; ORR: oxygen reduction reaction; SEM: scanning electron microscopy; PNC: phosphorus and nitrogen co-doped carbon; NC: nitrogen-doped carbon; BPA: bisphenol A.