Rational Design of Fe_1−xS/Fe₃O₄/Nitrogen and Sulfur‐Doped Porous Carbon with Enhanced Oxygen Reduction Reaction Catalytic Activity

Abstract

In this paper, the rational design of Fe‐N‐, Fe‐S‐, and Fe‐N‐S‐based model catalysts for oxygen reduction reaction (ORR), developed using task‐specific hypercrosslinked polymers as precursors is presented. Based on the model catalysts, atom‐induced differences in ORR performance are carefully examined. In the S‐doped carbons, Fe1−xS forms the metal nanoparticles, while the N sourced together with FeCl3 ensures the uniform distribution of Fe3O4. Obtained results indicate that N/Fe3O4 acts as the higher catalytic active site, whereas the S/Fe1−xS deteriorates the ORR catalytic activity. However, due to the synergistic effect between Fe1−xS /Fe3O4 and N, the S‐doped carbons can substantially enhance the ORR performance. Hence, this work provides guidance for the efficient design of Fe‐N‐S‐based catalysts for ORR.

In-situ growth of ZnS/FeS heterojunctions on biomass-derived porous carbon for efficient oxygen reduction reaction

“…The Fe 2 p spectrum of FeS/ZnS@N,S-C-900 shows two peaks at 711.6 and 725.0 eV ( Fig. 2 d), respectively, assigned to the Fe 2 p 3/2 and Fe 2 p 1/2 of Fe 2 + in FeS [12] . Two peaks at 1022.1 and 1045.2 eV assigned to the Zn 2 p 1/2 and Zn 2 p 3/2 , respectively, are observed in the Zn 2 p spectrum of FeS/ZnS@N,S-C-900 ( Fig.…”

Fe/Co-based nanoparticles encapsulated in heteroatom-doped carbon electrocatalysts for oxygen reduction reaction

“…Liu et al [82] prepared hierarchically porous N,Scodoped carbon with FeS NPs, which showed efficient ORR activity outperforming that of Pt/C. However, a recently reported research showed that Fe 1−x S/S impaired the ORR activity [83]. Unexpectedly, a positive synergistic effect between Fe 1−x S/Fe 3 O 4 and N,S-doped carbon greatly improved the ORR performance.…”

Nitrogen and Cobalt Co-Coped Carbon Materials Derived from Biomass Chitin as High-Performance Electrocatalyst for Aluminum-Air Batteries

“…where j L and j K are the limiting current for the electrode reaction of reactive species by the diffusioncontrolled process and the kinetic current, respectively. F (96486.4 C mol −1 ) is the Faraday constant, n is the electron transfer number, C 0 * (1.2 × 10 −6 mol cm −3 ) is the concentration of O 2 in 0.1 M KOH solution, D 0 (1.9 × 10 −5 cm 2 s −1 ) is the diffusion coefficient of O 2 in 0.1 M KOH, ω (rad s −1 ) is rotation rate and v (0.01 cm 2 s −1 ) is the kinematic viscosity of the electrolyte [41,42].…”