Fig. 1: Support geometry engineering strategy and characterisation of the morphology, chemical, and electronic structures of ssCuNC and CuNC. | Nature Communications

Fig. 1: Support geometry engineering strategy and characterisation of the morphology, chemical, and electronic structures of ssCuNC and CuNC.

From: Tuning binding strength between single metal atoms and supports enhances electrochemical CO2 methanation

Fig. 1

Schematic of the synthesis of (a) CuNC and (b) ssCuNC via support engineering. DCD dicyandiamide, PNP–Cu Cu-chelated polydopamine nanoparticles, ss–PNF–Cu Cu-bound polydopamine nanoparticles and films coated on ss. HAADF-STEM images with EDS mapping of C (yellow), N (blue), Cu (cyan) and O (tan) for c CuNC100 and d ssCuNC100. e N 1s and f Cu 2p XPS core spectra of ssCuNC100 and CuNC100. k3-weighted R-space Cu K-edge EXAFS spectra of (g) CuNC and (h) ssCuNC. i Cu K-edge EXAFS fitting in R space of CuNC100 and ssCuNC100. Simulated (Fit, yellow) curves are superimposed on experimental (Exp., blue) dots. Each spectrum contains the k3-weighted magnitude (dots) and real part (stars) of χ(R). j Average Cu–N bond lengths of CuN4 sites in CuNC and ssCuNC. Error bars represent one standard deviation from three independent trials. Source data are provided as a Source data file.

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