Simply constructed highly dispersed cobalt nanoparticles in diverse N-doped graphitic carbon with remarkable performances for water electrolysis

Ji, Xiaochao; Bo, Lili; Zhang, Yuning; Shi, Wenping; Guan, Xiaolin; Xia, Liucheng; Shen, Yuxing

doi:10.1016/j.ijhydene.2022.06.144

Cited by 14 publications

(4 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1h, which shows a large total Mercury intrusion of 42.1377 ml g −1 , indicating that Fe, Ni-Co 5.47 N@N-VrGO-2 has a large specific surface area of 52.17 and C-O, respectively. 43,44 This result means that the N element is successfully doped into VrGO. The fitted peak of N 1s (Figs.…”

Section: Resultsmentioning

confidence: 88%

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Kong,

Guo,

Liu

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

It is necessary to rationally develop iron group metal nitrides with noble-metal-like electronic structures as catalysts for water splitting. Here we report a novel electrocatalyst consisting of Fe/Ni-doped Co5.47N Nanoparticles integrated with N-doped vertically reduced graphene oxide arrays (N-VrGO) (Fe, Ni-Co5.47N@N-rGO) for overall water splitting. The suitable amount of metal addition, the vertical structure of N-VrGO, and the synergistic effect of N in N-VrGO and N in Fe, Ni-Co5.47N result in the enhanced electrocatalytic performance of Fe, Ni-Co5.47N@N-VrGO-2 catalyst in a wide pH range. It has lower overpotentials for hydrogen evolution reactions (94 mV, 121 mV) and oxygen evolution reactions (234 mV, 318 mV) in 1M KOH and 0.5 M H2SO4 electrolytes, respectively. The Fe, Ni-Co5.47N@N-VrGO-2 catalyst exhibits a good Faraday efficiency (about 90%) and outstanding stability (over 12 h). The synergistic effect of N in N-VrGO and N in Fe, Ni-Co5.47N promotes the electron rearrangement on the metal surface and further enhances the electrocatalytic performance of the catalyst. This work helps to better understand the synergistic interaction between iron group metal compounds and heteroatom-doped VrGO, and helps to more rationally select the substrates for iron group metal compounds.

show abstract

Section: Resultsmentioning

confidence: 88%

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Kong,

Guo,

Liu

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…[12][13][14][15] Therefore, non-precious metals, especially transition metal-based electrocatalysts have attracted more and more attention. [16][17][18][19] Transition metal-based phosphides, 20-27 suldes, [28][29][30][31] nitrides, [32][33][34][35] oxides, [36][37][38] and alloys [39][40][41][42][43] are all reported as effective electrocatalysts for HER, OER, and water splitting.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning construction of a Fe–Ni-based multicomponent hybrid as synergistic electrocatalyst for water electrolysis

Wang,

Ji,

et al. 2024

Sustainable Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…The most popular strategy is loading the catalyst onto N-doped graphitic carbon, which can not only enhance conductivity and dispersity but also protect the catalyst from oxidation during the OER process. 31 For example, Wang et. al successfully prepared a CoFe/nitrogen-doped graphitic carbon nanosheet composite catalyst, exhibiting excellent stability in alkaline media, as graphitic carbon nanosheets prevent agglomeration of alloy particles.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Importantly, the heterogeneous interface between crystalline and amorphous phases can combine the advantages of both phases to provide abundant active sites. , Simultaneously, it is crucial to enhance the conductivity, dispersion, and stability of the catalyst comprehensively. The most popular strategy is loading the catalyst onto N-doped graphitic carbon, which can not only enhance conductivity and dispersity but also protect the catalyst from oxidation during the OER process . For example, Wang et.…”

Section: Introductionmentioning

confidence: 99%

Interface Engineering Construction of a Ag-Modified Crystalline CoFe@Amorphous Fe₂O₃ Composite for Superior Oxygen Evolution Electrocatalysis

Bo,

Shen,

et al. 2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

The sluggish kinetics of the oxygen evolution reaction (OER) is a key resistance limiting the efficiency of related technologies. CoFe-based compounds, mainly alloys and oxides, are recognized as effective OER catalysts, with amorphous metal oxides displaying unique properties. The catalytic activity of a catalyst is intricately linked to its surface reactivity. However, efforts to construct composites with interfaces between CoFe-based metal alloys and amorphous metal oxides to further enhance the OER activities have progressed relatively slowly. In this work, a composite catalyst, denoted Ag/CoFe/Fe 2 O 3 /NC, was fabricated by incorporating Ag into crystalline CoFe@amorphous Fe 2 O 3 particles wrapped in graphitic N-doped carbon. The composite exhibited modulated electron density of Co active sites, promoted O 2 release, and an enhanced electron transfer rate on the heterogeneous interface between crystalline CoFe and amorphous Fe 2 O 3 . Additionally, the introduction of highly conductive Ag improved the electrical conductivity. Consequently, the composite demonstrated excellent performance and stability for OER in 1 M KOH. Notably, the catalyst exhibited competitive performance, requiring overpotentials of only 166 and 282 mV at 10 and 100 mA cm −2 , respectively. This places the catalyst among the most efficient, as far as we know. This work provides an excellent example of the rational design of electrocatalysts.

show abstract

Simply constructed highly dispersed cobalt nanoparticles in diverse N-doped graphitic carbon with remarkable performances for water electrolysis

Cited by 14 publications

References 58 publications

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Electrospinning construction of a Fe–Ni-based multicomponent hybrid as synergistic electrocatalyst for water electrolysis

Interface Engineering Construction of a Ag-Modified Crystalline CoFe@Amorphous Fe₂O₃ Composite for Superior Oxygen Evolution Electrocatalysis

Contact Info

Product

Resources

About

Simply constructed highly dispersed cobalt nanoparticles in diverse N-doped graphitic carbon with remarkable performances for water electrolysis

Cited by 14 publications

References 58 publications

Fe/Ni-Doped Co5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Fe/Ni-Doped Co5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Electrospinning construction of a Fe–Ni-based multicomponent hybrid as synergistic electrocatalyst for water electrolysis

Interface Engineering Construction of a Ag-Modified Crystalline CoFe@Amorphous Fe2O3 Composite for Superior Oxygen Evolution Electrocatalysis

Contact Info

Product

Resources

About

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Fe/Ni-Doped Co_5.47N Nanoparticles Integrated on Nitrogen-Doped Vertical Reduced Graphene Oxide Arrays for Overall Water Splitting in Wide pH Range

Interface Engineering Construction of a Ag-Modified Crystalline CoFe@Amorphous Fe₂O₃ Composite for Superior Oxygen Evolution Electrocatalysis