Boosting the oxygen reduction reaction behaviour of atomic Fe–N₄active sites in porous honeycomb-like carbonviaP heteroatom doping

Abstract

Fe-N-C single atom electrocatalysts (SAECs) with porphyrin-like Fe-N4 species are one of the most promising alternatives to platinum-group-metal-based electrocatalysts for oxygen reduction reaction (ORR). However, there are limited attention paid...

Axial modulation of Fe sites realizing high-performance oxygen reduction reaction of FeN4catalysts

“…40 In addition to this, the characteristic peaks of the Fe–Fe bond (2.21 Å) are not found in Fe-N 4 S 1 which indicates that the Fe atoms are isolated and dispersed well on the carbon matrix. 41 The fitted curve of EXAFS is shown in Fig. 4c and its EXAFS fitting parameters are shown in Table S2 †.…”

Recent progress in heteroatom doping to modulate the coordination environment of M–N–C catalysts for the oxygen reduction reaction

“…Therefore, the doping of P atoms in the adjacent positions of M–N x sites is expected to improve the intrinsic activity of the catalysts. Li et al 84 successfully anchored atomic-level dispersed Fe–N 4 sites on N,P co-doped porous honeycomb-like carbon by a facile process, designated as Fe–N 4 /NP-PHC. The unique 3D honeycomb structure and abundant P-doped Fe–N 4 sites of the Fe–N 4 /NP-PHC catalyst give it superior ORR catalytic activity ( E 1/2 = 0.89 V vs. RHE) to commercial Pt/C ( E 1/2 = 0.87 V vs. RHE) in 0.1 M KOH solution.…”

P‐Modified Single‐Atom Cu Catalyst Boosting Electrocatalytic Performance of NO3− Reduction to NH3

“…Although Cu−N−C electrocatalysts have shown active activity for NO 3 − RR, DFT calculations show that the d‐orbital energy levels of the Cu−N 4 site raises, resulting in unfavorable intermediate (i. e. *NOH) adsorption and therefore a large barrier for the formation of NH 3 [16] . The research by us and other groups show that the d‐orbital energy levels of Cu can be adjusted by directly replacing N with heteroatomic sulfur (S) or phosphorus (P) [3,17–20] . While the exploration of this strategy on intermediate adsorption and catalytic performance regulations has yet been reported for NO 3 − RR.…”