RESEARCH / A0237
Molecularly Crosslinked Dense Ni‐N4‐O/Ni Clusters for Scalable CO2 Electroreduction in Acidic and Alkali‐Metal‐Free Media
Read the original paper · 10.1002/smll.202511758 ↗
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. Microstructural and Valence State Analysis of the Catalysts. a) Schematic of the synthesis of NiX@NiN4-O, b) High-resolution transmission electron microscopy (HR-TEM) images of NiX@NiN4-O, c) STEM image of NiX@NiN4-O and corresponding EDS mapping showing the dispersion of C, Ni, O, and N elements, d–f) HAADF-STEM images of NiX@NiN4-O, g) XES spectrum of the catalysts and reference standards (NiPc and NiO), h) Ni K-edge XANES spectra of the catalysts and reference standards (NiPc, NiO, and Ni foil), i) FT-EXAFS spectra of the catalysts and reference standards, j) EXAFS fitting spectra of NiX@NiN4-O, k) EXAFS fitting spectra of NiN4-O.
Figure 4. Reaction Mechanism of the Catalysts. a) In situ ATR-SEIRAS spectra of NiX@NiN4-O, b) In situ ATR-SEIRAS spectra of NiN4-O, c) Normalized analysis of the *COOH signal from the in situ ATR-SEIRAS database, d) Normalized in situ Ni K-edge XANES spectra of NiX@NiN4-O, e) Normalized in situ Ni K-edge XANES spectra of NiN4-O, f) EXAFS fitting spectra of NiX@NiN4-O and NiN4-O, g) Linear combination fitting of the Ni K-edge XANES spectra of NiX@NiN4-O, h) Linear combination fitting of the Ni K-edge XANES spectra of NiN4-O.