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. 2023 May 3;14:2551. doi: 10.1038/s41467-023-38235-9

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Fig. 3 — a PXRD pattern, b N₂ sorption isotherm, c EPR spectrum, and XPS spectra expanded in the region of d Ni 2p_3/2, e N 1s, and f O 1s, of Ni₃N nanosheets.