Fe-Nx doped carbon nanotube as a high efficient cathode catalyst for proton exchange membrane fuel cell

Tailoring the d-band center of porous CoS2 nanospheres via low-electronegative Fe for weakened OH* adsorption and boosted oxygen evolution

“…2c can respectively correspond to Fe-N x , Fe 2+ , Fe 3+ , and satellite peaks. 57 The binding energy of the Fe 2p spectrum gradually shifts negatively in the following order of (Fe 0.20 Co 0.80 )S 2 , (Fe 0.25 Co 0.75 )S 2 and (Fe 0.33 Co 0.67 )S 2 , which further confirms the existence of electron transfer between Co and Fe (Table S4 †). 58,59 The strong electronic coupling between cobalt and iron can effectively regulate the charge distribution of the active site, resulting in the promotion of OER activity.…”

Correlation of the spin state and catalytic property of M–N4single-atom catalysts in oxygen reduction reactions

“…Mn, Fe, and Co) N-C catalysts, have been demonstrated to exhibit high ORR activity according to studies. 1,[17][18][19][20][21][22] The ORR activity is regulated via changes in the geometry structure and electron structure. [23][24][25] Additionally, P-induced edge-type Fe-N 4 active sites on hollow carbon nanocages exhibit Pt-like ORR activity in acidic media, attributed to the influence of P on the electronic structure of the Fe-N 4 sites via long-range delocalization on carbon substrates.…”

2D Single-Atom Fe–N–C Catalyst Derived from a Layered Complex as an Oxygen Reduction Catalyst for PEMFCs

“…However, the ligand selection and structure design are key factors to impede agglomeration and improve the performance of ORR. M–N–C catalysts, especially Fe–N–C catalysts, − can be the most prospective non-precious-metal catalysts for commercial applications due to their abundant source, low cost, and high catalytic activity. However, their inferior stability in acids is still a challenge.…”