Fig. 1: Structural identification of Ni-N-C.
From: Asymmetric dinitrogen-coordinated nickel single-atomic sites for efficient CO2 electroreduction
a Aberration-corrected HAADF-STEM image. b Elemental mapping. c XES spectra of Ni-N-C, NiPc, and NiO. Inset is the zoom in of Kβ’ located at the yellow region. d Ni K-edge XANES spectra of Ni-N-C, Ni foil, and NiPc. e N K-edge XANES spectra of Ni-N-C and NC. f FT-EXAFS fitting results of Ni-N-C and NiPc. Inset shows the local coordination structure of Ni sites in Ni-N-C.
