Defect-controlled Fe-N-doped carbon nanofiber by ball-milling for oxygen reduction reaction

Sohn, Yeonsun; Kim, Dong‐Gun; Lee, Ji Ho; Hwang, In Seon; Lee, Soo-Hyoung; Yoo, Sung Jong; Kim, Pil

doi:10.1007/s11814-020-0522-5

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…Plasma treatment is a popular method to attach the proper functional groups to CFs uniformly 16,17 . Besides that, this plasma treatment is clean, solvent‐free, time saving, and environmentally friendly method 32‐34 . Of them, N 2 and O 2 plasmas are mostly famous and enable the proper surface modification of CFs.…”

Section: Resultsmentioning

confidence: 99%

“…16,17 Besides that, this plasma treatment is clean, solvent-free, time saving, and environmentally friendly method. [32][33][34] Of them, N 2 and O 2 plasmas are mostly famous and enable the proper surface modification of CFs. Thus, such plasma treatments are applied and their effects on redox properties of TironA are evaluated (Figure 2).…”

Section: The Performance Evaluations Of Qrfb Full Cellsmentioning

confidence: 99%

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The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

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Shin

Lee

et al. 2021

Intl J of Energy Research

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4,5-dihydroxybenzene-1,3-disulfonic acid (Tiron) and anthraquinone-2,-7-disulfonic acid (AQDS) are interesting redox couples for aqueous quinonebased redox flow batteries (QRFBs) because of their high solubility and good reaction reversibility in acidic condition. Tiron is rate-determining material due to its slow reaction kinetics. To improve that, Tiron is transformed into 2,4,5,6-tetrahydroxybenzene-1,3-disulfonic acid (TironA), which is effectively formed during the first cycle of QRFB. Once TironA is formed, a desirable two-electron redox reaction with stable and reproducible charge and discharge step of QRFB occurs, although the electron transfer of TironA is still lower than that of AQDS. To further facilitate that of TironA, oxygen (O 2 ) and nitrogen (N 2 ) plasma-treated carbon felt (CF) electrodes are suggested. Oxygen functional groups formed onto CF by O 2 plasma become the active sites for redox reaction of TironA. As the amount of oxygen functional groups formed increases, the redox reactivity of TironA is enhanced. In contrast, when N 2 plasma is used, pyrrolic N and quaternary N are mainly formed. With the formation, (i) hydrogen atoms within pyrrolic N act as proton donor and interact with oxygen groups of TironA and (ii) nitrogen cations within quaternary N interact with the negatively charged atoms of TironA by electrostatic interaction. Thus, both reaction kinetic of TironA and performance of QRFB increase.Regarding the performance of QRFB using N 2 plasma-treated CF, its energy efficiency (EE), discharging capacity, and state of charge are 62%, 17.3 AhrÁL À1 and 64.5% for 50 cycle, which correspond to excellent achievements.

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Section: Resultsmentioning

confidence: 99%

Section: The Performance Evaluations Of Qrfb Full Cellsmentioning

confidence: 99%

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

Permatasari

Shin

Lee

et al. 2021

Intl J of Energy Research

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Coupling Pd nanoparticles on fine Ti4O7 with oxygen vacanciesas a high-activity, long-life ORR electrocatalyst

Niu

Jia

et al. 2021

Ionics

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Micro Flower-Like Hierarchical Mo2C/Co@NC (N-Doped Carbon) for Efficient Bifunctional Electrocatalyst

Kim,

Lim,

Woo

et al. 2024

Korean J. Chem. Eng.

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The development of low-cost and high-e ciency electrocatalysts for the water-splitting reaction to produce oxygen and hydrogen from alkaline electrolytes remains a major challenge, especially from the perspective of realizing fast and e cient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) catalysts, and it is important to improve the performance of these reactions through rational catalyst design. In this study, Co-based heterostructures composed of cobalt (Co) and molybdenum carbide (Mo 2 C) nanoparticles with micro-ower-like structures were intentionally designed as precursors for OER and HER electrocatalysts. In particular, during polymerization, nanoparticle (metal precursor) ions and dopamine aggregates combined to grow into nano akes and retained their structure after carbonization, forming micro-ower-like structures characterized by high speci c surface area and porosity. The catalysts with hierarchical heterostructures constructed using this unique structure showed activities similar to those of the commercially available IrO 2 and Pt/C catalysts, reaching current densities of 10 mA/cm 2 for OER and HER in 0.1 M KOH and exhibiting good durability. Therefore, our results present new concepts for the structuring and fabricating catalysts to realize e cient OER and HER kinetics, and we expect that they will be utilized in the energy conversion eld.

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Defect-controlled Fe-N-doped carbon nanofiber by ball-milling for oxygen reduction reaction

Cited by 9 publications

References 41 publications

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

The effect of plasma treated carbon felt on the performance of aqueous quinone‐based redox flow batteries

Coupling Pd nanoparticles on fine Ti4O7 with oxygen vacanciesas a high-activity, long-life ORR electrocatalyst

Micro Flower-Like Hierarchical Mo2C/Co@NC (N-Doped Carbon) for Efficient Bifunctional Electrocatalyst

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