Fig. 2: Physical characterisation of multivariate COFs. | Nature Communications

Fig. 2: Physical characterisation of multivariate COFs.

From: Multivariate covalent organic frameworks with tailored electrostatic potential promote nitrate electroreduction to ammonia in acid

Fig. 2

a, b Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (AC HAADF STEM) images and (c) corresponding elemental mappings of the synthesised BECOF. Scale bars, a 5 nm; b 1 nm; c 50 nm. d X-ray diffraction (XRD) patterns, e Fourier transform infrared (FTIR) spectra, f 13C solid-state nuclear magnetic resonance (SSNMR) spectra, g X-ray photoelectron spectroscopy (XPS) survey spectra, and (h) high-resolution N 1s XPS spectra of BCOF, BECOF, and ECOF.

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