Nickel-Iron nitrides and alloy heterojunction with amorphous N-doped carbon Shell: High-efficiency synergistic electrocatalysts for oxygen evolution reaction

(FexNi1−x)4N nanoparticles: magnetism and electrocatalytic properties for the oxygen evolution reaction

“…, (Fe 1 Ni 0 ) 4 N (57 mV dec −1 ), (Fe 0.95 Ni 0.05 ) 4 N (40 mV dec −1 ) and (Fe 0.88 Ni 0.12 ) 4 N (43 mV dec −1 ), which indicated the more favorable reaction kinetics of (Fe 0.90 Ni 0.10 ) 4 N for OER. This overpotential (292 mV) and Tafel slope (29 mV dec −1 ) were also much lower than that for many of the previously reported Fe- or Ni-based compounds (Table S3, ESI†), such as phosphides and nitrides, 1,28,34,36,39 furthermore, it was better than that for the IrO 2 benchmark 28 for OER, which suggested that the (Fe x Ni 1− x ) 4 N NPs were a promising catalyst for OER. A more precise and convenient comparison, for overpotentials at a current density of 10 mA cm −2 and the corresponding Tafel slopes are summarized for different catalysts in Fig.…”

“…As shown in Fig. 5(b), the superior OER performance of (Fe 0.90 Ni 0.10 ) 4 N was also confirmed by its S3, ESI †), such as phosphides and nitrides, 1,28,34,36,39 furthermore, it was better than that for the IrO 2 benchmark 28 for OER, which suggested that the (Fe x Ni 1Àx ) 4 N NPs were a promising catalyst for OER. A more precise and convenient comparison, for overpotentials at a current density of 10 mA cm À2 and the corresponding Tafel slopes are summarized for different catalysts in Fig.…”

“…The Ni 2p spectra is shown in Fig. 3(b), and the two major peaks at 873.2 eV and 855.6 eV can be ascribed to 2p 1/2 and 2p 3/2 , respectively, for Ni 2+ , 34,35 and another two satellite peaks for Ni 2+ were observed at 877.8 eV and 861.8 eV. As shown in Fig.…”

“…[23][24][25][26] In practical applications, compared with monometallic nitrides, the introduction of another transition metal element such as Co, Mn, or Ni to replace the Fe atoms cannot only optimize the magnetic properties, reduce magnetostriction and enhance the thermal stability of iron nitride materials, but also improves its performance in the field of electrocatalysis. [27][28][29][30][31][32][33][34]41,42 Some bimetallic nitrides have been investigated recently. For example, Guo et al reported metallic state two-dimensional holey-structured Co 3 FeN nanosheets as stable and bifunctional electrocatalysts for zinc-air batteries.…”

Transition Metal Nitrides for Electrocatalytic Application: Progress and Rational Design

“…The rational design of TMNs’ nanocrystalline-based electrocatalysts can not only notably reduce the consumption of precious metals, but also improve the ionic conductivity of materials by shortening the diffusion length of ions in the electrocatalytic process. Therefore, the design of favorable nanostructures for electrode materials can significantly improve electrocatalytic performance [ 31 , 32 , 33 ]. The unique nanostructure will provide new features of the electrocatalytic surface, which can significantly enhance the activity of the electrocatalyst, and lead to a large specific surface area and more adsorption and reaction sites [ 34 ].…”