RESEARCH / A0317
CO2‐Mediated Dynamic Site Modulation in Copper Catalysts for Selective Electrocatalytic Nitrite‐to‐Ammonia Conversion
Read the original paper · 10.1002/adfm.202512473 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. XAS and XPS analyses of the chemical valence state and coordination structure of the synthesized catalysts. a) and b) XANES spectra, and c) Fourier–transformed Cu K–edge EXAFS spectra of Cu–N4C, Cu–N4C/Cux, Cu–NPs, Cu foil, and Cu PC. Model–based fittings of Cu EXAFS for d) Cu–N4C, e) Cu–N4C/Cux, and f) Cu–NPs, with corresponding magnified local structures shown in the insets. g) Cu K–edge WT–EXAFS analyses of Cu–N4C, Cu–N4C/Cux, and Cu–NPs. XPS spectra of h) Cu 2p and i) N 1s for Cu–N4C, Cu–N4C/Cux, and Cu–NPs.