Nitrogen doped carbon nanotubes and nanofibers: Composition, structure, electrical conductivity and capacity properties

Olga Yu Podyacheva, Svetlana V. Cherepanova, Anatoly I. Romanenko, Lidiya S. Kibis, Dmitry A. Svintsitskiy, Andrei I. Boronin, Olga A. Stonkus, Arina N. Suboch, Andrei V. Puzynin, Zinfer R. Ismagilov

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Structurally different nitrogen doped nanotubes and nanofibers (N-CNTs and N-CNFs) synthesized by a standard method of decomposing ethylene-ammonia mixtures on metal catalysts were studied. In N-CNTs the uniform distribution of nitrogen and the formation of the ordered defects were registered. The ordered defects comprise four carbon vacancies and pyridine-like nitrogen, according to the performed structural simulation. On the contrary, N-CNFs were found to have the non-uniform distribution of nitrogen; their structural defects are disordered and also contain the pyridine-like nitrogen. An increase in the nitrogen content in N-CNTs, and hence in the amount of ordered defects, leads to a monotonic decrease in conductivity. For N-CNFs the dependence of conductivity on the nitrogen content is non-monotonic and is characterized by the extremum due to the competition of electron doping and structure disordering. A similar enhancement of the electrode capacity with raising the nitrogen content both in N-CNTs and N-CNFs was observed and explained by improved hydrophilic properties of the nitrogen doped carbon nanomaterials.

Original languageEnglish
Pages (from-to)475-483
Number of pages9
JournalCarbon
Volume122
DOIs
Publication statusPublished - 1 Oct 2017

Keywords

  • ENHANCED PHOTOCATALYTIC CAPABILITY
  • RAY PHOTOELECTRON-SPECTROSCOPY
  • POWDER DIFFRACTION PATTERNS
  • RAMAN-SPECTROSCOPY
  • FORMIC-ACID
  • ETHYLENE/AMMONIA MIXTURE
  • ELECTRONIC-PROPERTIES
  • HYDROGEN-PRODUCTION
  • LITHIUM STORAGE
  • VISIBLE-LIGHT

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