Influence of nitrogen doping on carbon nanotubes towards the structure, composition and oxygen reduction reaction

W. Y. Wong, Wan Ramli Wan Daud, Abu Bakar Mohamad, Abdul Amir H. Kadhum, Kee Shyuan Loh, Edy Herianto

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Nitrogen-doped carbon nanotubes (NCNTs) as noble-metal free catalysts were synthesised via chemical vapour deposition using iron (II) phthalocyanine as a metal catalyst for growth of the nanotubes. The synthesis process was performed in one step in a tube furnace using different chemical precursors (aniline, diethylamine and ethylenediamine) as nitrogen sources. The NCNT samples were physically characterised using scanning electron microscopy, transmission electronic microscopy and X-ray photoelectron spectroscopy. Cyclic voltammetry measurements were conducted to investigate the oxygen reduction reaction (ORR), and they showed that the electrocatalytic activities depend on the structural and morphological changes in the NCNTs. The results showed that NCNTs synthesised from ethylenediamine precursors exhibit an ORR scheme proceed via indirect four electron transfer process in acidic media, which implies that these NCNTs are a candidate for serving as the cathodic catalyst in PEMFCs. The highly active NCNTs possess unique characteristics, including a high concentration of surface defects with high pyridinic-N and pyridinic-N-oxides configurations that serve as active sites for ORR activity in acidic media.

Original languageEnglish
Pages (from-to)9421-9430
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number22
DOIs
Publication statusPublished - 26 Jul 2013

Fingerprint

Carbon nanotubes
carbon nanotubes
Doping (additives)
Nitrogen
nitrogen
Oxygen
oxygen
Chemical analysis
ethylenediamine
catalysts
Catalysts
Surface defects
Proton exchange membrane fuel cells (PEMFC)
surface defects
Aniline
Precious metals
aniline
noble metals
Nanotubes
Cyclic voltammetry

Keywords

  • Nitrogen-doped carbon nanotubes
  • Noble-metal free catalyst
  • Oxygen reduction reaction
  • PEMFC

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Influence of nitrogen doping on carbon nanotubes towards the structure, composition and oxygen reduction reaction. / Wong, W. Y.; Wan Daud, Wan Ramli; Mohamad, Abu Bakar; Kadhum, Abdul Amir H.; Loh, Kee Shyuan; Herianto, Edy.

In: International Journal of Hydrogen Energy, Vol. 38, No. 22, 26.07.2013, p. 9421-9430.

Research output: Contribution to journalArticle

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