A review of the development of nitrogen-modified carbon-based catalysts for oxygen reduction at USC

The enhanced electrocatalytic activity of okara-derived N-doped mesoporous carbon for oxygen reduction reaction

“…This indicates that almost all pyridinic-N-oxide was transformed to pyridinic-N, pyrrolic-N, and graphitic-N in NeC-3, (illustrated in Scheme 2). The transformation phenomena that pyrrolic-N can be gradually converted to pyridinic-N and quaternary-N with heattreatment above 600 C, and that pyridinic-N-oxide can be converted to pyridinic-N in acidic environment have been reported by Liu et al [35]. The present study shows that iron plays a key role in the conversion from inert N type to active N species and that this coincides with high ORR activity.…”

Activity, Performance, and Durability for the Reduction of Oxygen in PEM Fuel Cells, of Fe/N/C Electrocatalysts Obtained from the Pyrolysis of Metal-Organic-Framework and Iron Porphyrin Precursors

“…In particular, Popov and collaborators, who defended this idea, have attributed the lack of durability of Metal/N/C catalysts to the protonation of the basic pyridinic nitrogen atoms, while graphitic nitrogen atoms remained unprotonated and therefore active for ORR [53]. Could this idea explain the common instability behavior of all NC Por_0.8-T Ar + NH 3 catalysts with T = 850, 950, and 1050 C, and the different instability behavior for the same type of catalysts for which T = 1150 C?…”

Quaternized Graphene Oxide Nanocomposites as Fast Hydroxide Conductors

“…At higher energy bond of 402.78 eV a small broad peak was seen which could be attributed to both ammonium cation in QAFGO and pyridinic nitrogen-siloxane bond in 3-QAFGO/pPBI. 32,[42][43][44] The latter might signify that some of the existent siloxane groups in QAFGO were bonded to pyridinic nitrogen of imidazole in pPBI.…”