Submerged liquid plasma-low energy synthesis of nitrogen-doped graphene for electrochemical applications

Jaganathan Senthilnathan, Kodepelly Sanjeeva Rao, Masahiro Yoshimura

研究成果: Article

39 引文 斯高帕斯(Scopus)

摘要

In this study, micro-plasma discharge is produced by applying a high electric potential between graphite and Pt electrodes in acetonitrile solvent. The electrons generated in the micro-plasma discharge collide with acetonitrile and produce H and CH2CN radicals. The radicalized graphene layer exfoliated from the graphite electrode reacts with nascent hydrogen (H) and acetonitrile (CH2CN) radicals and partially restores its aromaticity and conjugation. Raman spectra of the product confirm the synthesis of nitrogen-functionalized graphene (N-FG), which has a marginal increase in disorderness compared to that of pure graphite and remarkable dispersibility in both hydrophilic and hydrophobic solvents. The excellent fluorescence properties of N-FG confirm the presence of fluorophores such as -NH and -NC- at the radicalized graphene sites, as supported by ultraviolet-visible spectroscopy and X-ray photoelectron spectroscopy studies. The functional groups present in N-FG lead to excellent electrochemical performance, with distinct redox peaks in cyclic voltammetry and a high specific capacitance of 291 F g-1 at a scan rate of 5 mV s-1. N-FG exhibits excellent cycling stability, with a marginal reduction of specific capacitance (<10% reduction) at the end of 1000 cycles.

原文English
頁(從 - 到)3332-3337
頁數6
期刊Journal of Materials Chemistry A
2
發行號10
DOIs
出版狀態Published - 2014 三月 14

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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