fig6

Figure 6. (A) The XANE spectra of Fe SAC, Fe foil and Fe₂O₃ at Fe K-edge; (B) FT k³-weighted χ(k)-function of the EXAFS spectra at Fe K-edge; (C) XANES spectrum of Fe SAC at Fe L-edge. This figure is quoted with permission from Wu et al.^[56]; (D) Operando SR-FTIR spectra of Fe-N/P-C catalyst during NITRR process; (E) Time-dependent planar SR-FTIR spectra (-0.4 V vs. RHE). This figure is quoted with permission from Xu et al.^[59]; (F) EPR spectra of Cu NWs, Rh@Cu-0.6% and Rh NPs based NITRR systems at -0.1 V vs. RHE (react for 3 min); (G) DEMS measurements of NITRR using Rh@Cu-0.6% as the catalyst. This figure is quoted with permission from Liu et al.^[72]; (H) EPR signals of DMPO-H from the NITRR system using Cu NSs, V-Cu NSs and VCu-Au₁Cu SAAs as the catalyst; (I) EPR signals of DMPO spin adducts from the NITRR system using VCu-Au₁Cu SAAs as the catalyst. This figure is quoted with permission from Zhang et al.^[75].