One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon-carbon nanotube hybrids

Egor V. Lobiak, Lyubov G. Bulusheva, Ekaterina O. Fedorovskaya, Yury V. Shubin, Pavel E. Plyusnin, Pierre Lonchambo, Boris V. Senkovskiy, Zinfer R. Ismagilov, Emmanuel Flahaut, Alexander V. Okotrub

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Novel nitrogen-doped carbon hybrid materials consisting of multiwalled nanotubes and porous graphitic layers have been produced by chemical vapor deposition over magnesium-oxide-supported metal catalysts. CNx nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carbon structures was due to the slow activation of catalysts for the nanotube growth in a carbon-containing gas environment. An analysis of the obtained products by means of transmission electron microscopy, thermogravimetry and X-ray photoelectron spectroscopy methods revealed that the catalyst's composition influences the nanotube/porous carbon ratio and concentration of incorporated nitrogen. The hybrid materials were tested as electrodes in a 1M H2SO4 electrolyte and the best performance was found for a nitrogen-enriched material produced using the Fe/Mo catalyst. From the electrochemical impedance spectroscopy data, it was concluded that the nitrogen doping reduces the resistance at the carbon surface/electrolyte interface and the nanotubes permeating the porous carbon provide fast charge transport in the cell.

Original languageEnglish
Pages (from-to)2669-2679
Number of pages11
JournalBeilstein Journal of Nanotechnology
Volume8
Issue number1
DOIs
Publication statusPublished - 12 Dec 2017

Keywords

  • Bimetallic catalyst
  • Eectrochemical impedance spectroscopy
  • N-doped carbon
  • Porous carbon-carbon nanotube hybrid
  • Supercapacitor
  • N-2 MOLECULES
  • ION BATTERIES
  • electrochemical impedance spectroscopy
  • porous carbon-carbon nanotube hybrid
  • OXIDE
  • GRAPHENE
  • NANOMATERIALS
  • NANOPARTICLES
  • TEMPERATURE
  • LITHIUM-SULFUR BATTERIES
  • RAY PHOTOELECTRON-SPECTROSCOPY
  • ELECTROCHEMICAL CAPACITORS
  • bimetallic catalyst
  • supercapacitor

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