Fig. 3: The synthesis and structural characterization of Nickel molecular catalysts.
From: Efficient amino-acid-based reactive capture of CO2 via nickel molecular catalyst
a Schematic illustration of atomically dispersed nickel molecular catalyst preparation. b High-angle annular dark-field scanning TEM (HAADF-STEM) image and energy dispersive X-ray spectroscopy (EDS) maps (C, red; N, green; Ni, pink) of NiN3–Pc–CNT. c HAADF-STEM image of NiN3–Pc–CNT. d X-ray diffraction patterns of NiN3–Pc–CNT, NiPc–CNT, CNT and NiPc. The JCPDS profiles of graphite (blue) and metallic nickel (dark yellow) are displayed for reference. e UV–vis spectra of NiN3–Pc–CNT and NiPc–CNT. f, g Ni K-edge XANES spectra, along with marked positions for the comparison of oxidation state (these positions were determined by the first inflection point in the edge region) (f) and Ni K-edge EXAFS spectra (g) of NiN3–Pc–CNT, NiPc–CNT and Ni foil. Voltages are not iR-corrected. Source data are provided as a Source data file.
