Fig. 2: Characterizations of P species.
From: Graphitic phosphorus coordinated single Fe atoms for hydrogenative transformations
a Deconvoluted P 2p XPS spectra of Fe-Px-PCCs. All of the spectra were deconvoluted using three doublet peaks with an area ratio of 0.5 and a separation between peaks of 0.84 eV. b Solid-state 31P NMR spectra of Fe-Px-PCCs. Spinning side bands are marked with asterisk. c The relationships between catalytic activity and content of Pgrap.
