Activity and active sites of nitrogen-doped carbon nanotubes for oxygen reduction reaction

Altansukh Dorjgotov, Jinhee Ok, YuKwon Jeon, Seong Ho Yoon, Yong-Gun Shul

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Nitrogen-doped carbon (CNx) nanotubes were synthesized by thermal decomposition of ferrocene/ethy-lenediamine mixture at 600-900 °C. The effect of the temperature on the growth and structure of CNx nanotubes was studied by transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. With increasing growth temperature, the total nitrogen content of CNx nanotubes was decreased from 8.93 to 6.01 at.%. The N configurations were changed from pyr-rolic-N to quaternary-N when increasing the temperature. Examination of the catalytic activities of the nanotubes for oxygen reduction reaction by rotating disk electrode measurements and single-cell tests shows that the onset potential for oxygen reduction in 0.5 M H2SO4 of the most effective catalyst (CNx nanotubes synthesized at 900 °C) was 0.83 V versus the normal hydrogen electrode. A current density of 0.07 A cm-2 at 0.6 V was obtained in an H 2/O2 proton-exchange membrane fuel cell at a cathode catalyst loading of 2 mg cm-2.

Original languageEnglish
Pages (from-to)387-397
Number of pages11
JournalJournal of Applied Electrochemistry
Volume43
Issue number4
DOIs
Publication statusPublished - 2013 Jan 9

Fingerprint

Carbon Nanotubes
Nanotubes
Carbon nanotubes
Nitrogen
Oxygen
Electrodes
Catalysts
Rotating disks
Growth temperature
Proton exchange membrane fuel cells (PEMFC)
Raman spectroscopy
Hydrogen
Catalyst activity
Pyrolysis
Cathodes
Current density
X ray photoelectron spectroscopy
Transmission electron microscopy
Temperature

All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Dorjgotov, Altansukh ; Ok, Jinhee ; Jeon, YuKwon ; Yoon, Seong Ho ; Shul, Yong-Gun. / Activity and active sites of nitrogen-doped carbon nanotubes for oxygen reduction reaction. In: Journal of Applied Electrochemistry. 2013 ; Vol. 43, No. 4. pp. 387-397.
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Activity and active sites of nitrogen-doped carbon nanotubes for oxygen reduction reaction. / Dorjgotov, Altansukh; Ok, Jinhee; Jeon, YuKwon; Yoon, Seong Ho; Shul, Yong-Gun.

In: Journal of Applied Electrochemistry, Vol. 43, No. 4, 09.01.2013, p. 387-397.

Research output: Contribution to journalArticle

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