Design of ZIF-67-derived Fe, N and F co-doped porous carbon material and evaluation of its ORR and OER performance

Electrospinning-derived transition metal/carbon nanofiber composites as electrocatalysts for Zn-air batteries

“…For instance, in the co-doping of N and S, the introduction of S not only provides supplementary active sites but also enhances the activity of adjacent carbon atoms bonded to N. This is attributed to the further promotion of charge and spin redistribution of carbon by incorporating thiophene S into the nitrogen-doped carbon network, thereby optimizing the adsorption and resolution processes of intermediates. 114 Similar synergies are observed between heteroatoms of varying electronegativities, such as F/N, 115 P/N, 116 F/P/N, 117 F/B/N, 118 and so forth.…”

ZIF-67-Derived CoFe2O4/NiCo2O4@NC/CC with Oxygen-Enriched Vacancy for High-Performance Electrocatalyst toward Oxygen Evolution Reaction

“…Obviously, the N contents in the catalysts are very low so they are hardly observed in the survey scan spectra (Figure S6a, Supporting Information). The presence of N originates from the decomposition of 2-methylimidazole (2-MI) ligand and subsequently is doped into porous carbon as pyridinic N, graphitic N, and pyrrolic N (Figure S6b, Supporting Information), modifying the electronic structures of porous carbon and thereby promoting the chemical reactivity of catalysts. − Also, C 1s spectra reveal the presence of C–N bonds, further suggesting that N is successfully doped into porous carbon (Figure S6c, Supporting Information). In the Co 2p region, the O v -CO@NC/CC-550 shows two spin–orbit doublets and two shakeup satellite peaks (termed as “Sat.”), which are the characteristics of Co 3+ (2p 3/2 at 779.3 eV and 2p 1/2 at 795.2 eV) and Co 2+ (2p 3/2 at 781.4 eV and 2p 1/2 at 797.7 eV) (Figure a) .…”