Nitrogen-doped graphene-wrapped iron nanofragments for high-performance oxygen reduction electrocatalysts

Lee, Jang Yeol; Kim, Na Young; Shin, Dongyun; Park, Hee-Young; Lee, Sang Soo; Kwon, Soonho; Lim, Dong‐Hee; Bong, Ki Wan; Son, Jeong Gon; Kim, Jin Young

doi:10.1007/s11051-017-3793-y

Cited by 50 publications

(19 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak positioned at 283.8 eV can be attributed to the C-C bonds while the peaks positioned at 285.12, 286.6, and 289.42 eV can be attributed to the C-N/C-O, C═N/C═O and O-C═O species present in the sample. 25 Similarly the high-resolution XPS plot of N provided in the Figure 1F can be separated into four types of N species. The peaks positioned at 397.37 eV can be ascribed to pyridinic N species while the peaks positioned at 399.19, 400.66, and 404.86 eV may correspond to the pyrrolic, graphitic, oxidised N species, respectively.…”

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Constructing micropore‐rich nitrogen‐doped carbon for high‐performance supercapacitor and adsorption of carbon dioxide

Sahu

Mishra

Panigrahy

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Design of advanced highly porous heteroatom‐doped carbon is desirable for their wide presence in applications like electrochemical energy storage systems, gas adsorption, and separation processes. In this work, porous nitrogen‐doped carbon was developed from ethylenediamine via an in situ self‐doping solvothermal process followed by pyrolysis and KOH activation under high temperature. Micropore‐rich nitrogen‐containing carbon materials were prepared through variation of the KOH/C ratio during activation and their electrochemical performance in alkaline electrolyte as well as CO2 sorption behaviour was evaluated. The porous carbon developed using KOH/C ratio of 2 delivered highest supercapacitor performance in 6 M KOH achieving high specific capacitance of 353 F g−1 with 1 A g−1 of current due to its high pore volume and micropore rich surface. The functionalized carbon delivered CO2 uptake capacities of 4.48 and 3.0 mmol g−1 under temperatures of 273 and 298 K, respectively, at 1 bar pressure with a good CO2/N2 selectivity of 20.58 and CO2/CH4 selectivity of 3.83. The existence of nitrogen functional groups, high surface area, and micropore‐rich porous structures may be the essential reasons behind superior electrode performance and CO2 capture capacity of the material. This work hopefully offers a simple development of N‐doped carbon for effective energy storage and CO2 adsorption systems.

show abstract

Section: Resultsmentioning

confidence: 98%

“…Similarly the high‐resolution XPS plot of N provided in the Figure 1F can be separated into four types of N species. The peaks positioned at 397.37 eV can be ascribed to pyridinic N species while the peaks positioned at 399.19, 400.66, and 404.86 eV may correspond to the pyrrolic, graphitic, oxidised N species, respectively 25 …”

Section: Resultsmentioning

confidence: 99%

Constructing micropore‐rich nitrogen‐doped carbon for high‐performance supercapacitor and adsorption of carbon dioxide

Sahu

Mishra

Panigrahy

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

show abstract

“…Notably, graphene with more than 10 layers becomes more identical to graphite. 38 In addition, an elongated Fe 3 C NP at the end of CNT was observed, which presents a d value of 0.208 nm, corresponding to the (111) facet of Fe 3 C (Figure 1c2). The formation of Fe 3 C is also confirmed by its XRD spectrum (Figure 1d).…”

Section: Resultsmentioning

confidence: 98%

Fullerene-Derived Carbon Nanotubes and Their Electrocatalytic Properties in Oxygen Reduction and Zn–Air Batteries

Peng

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Carbon-based materials with superior electrochemical performances have been prepared from fullerenes by releasing their intrinsic advantages such as pentagon defects and π-electron carbons. To the best of our knowledge, fullerene-derived carbon nanotubes (CNTs) and their electrochemical behavior have not been experimentally investigated. In this work, in situ growth of CNT composites from fullerene is realized via a self-catalyzed process by employing an Fe-decorated fullerene (ferrocenylpyrrolidine C60) as the precursor and NH3 as the pyrolysis atmosphere. The results show that the in situ Fe doping in fullerene, the self-assembly of fullerene molecules, the pyrolysis temperature, and the NH3 flow play essential roles in the generation of CNTs. The as-prepared MN7-10/3 CNT composite exhibits efficient oxygen reduction performance with E 1/2 = 0.82 V and E on = 1.02 V vs the RHE. The flexible solid-state Zn–air battery constructed based on MN7-10/3 exhibits a superior power density (109.3 mW cm–2 at 180.9 mA cm–2) and long-term durability (the voltage remains at 95.6% of the initial value after discharging for 5000 s) compared with the benchmark Pt/C catalyst. The transformation of the Fe-decorated fullerene to CNTs reveals a new function of fullerenes and demonstrates a new solid-state synthetic method for CNTs.

show abstract

“…Porous graphene 15 is produced as a single sheet of carbon, bonded in a planar, hexagonal structure, with several carbon atoms removed to create a "pore", shown in figure [3] 16,17 which can be used as a nanofilter 18 . Due to graphene's open structure, electrons and protons can freely pass through the lattice with minimal resistance, while restricting the flow of larger molecules, which may only pass through the pores 6 .…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic Effects of Nanotechnological Augmentation of Hydrogen Fuel Cells

Woodley

Yang

Tanner

et al. 2017

PAMR

View full text Add to dashboard Cite

This meta-study focuses on the research regarding the use of nanotechnology in traditional fuel cells in order to increase thermodynamic efficiency through the exploitation of various thermodynamic systems and theories. The use of nanofilters and nano-structured catalysts improve the fuel cell system through the means of filtering molecules from protons and electrons significantly increases the possible output of the fuel cell and the use of nano-platinum catalysts to lower the activation energy of the fuel cell chemical reaction a notable amount resulting in a more efficient system and smaller entropy in comparison to the use of macro sized catalysts.

show abstract

Nitrogen-doped graphene-wrapped iron nanofragments for high-performance oxygen reduction electrocatalysts

Cited by 50 publications

References 63 publications

Constructing micropore‐rich nitrogen‐doped carbon for high‐performance supercapacitor and adsorption of carbon dioxide

Constructing micropore‐rich nitrogen‐doped carbon for high‐performance supercapacitor and adsorption of carbon dioxide

Fullerene-Derived Carbon Nanotubes and Their Electrocatalytic Properties in Oxygen Reduction and Zn–Air Batteries

Thermodynamic Effects of Nanotechnological Augmentation of Hydrogen Fuel Cells

Contact Info

Product

Resources

About