The impact of loading and temperature on the oxygen reduction reaction at nitrogen-doped carbon nanotubes in alkaline medium

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

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Metal-free nitrogen-doped carbon nanotube (NCNT) catalysts were synthesised via chemical vapour deposition with ethylenediamine and iron phthalocyanine. The electrochemically active NCNT was studied via thin-film rotating-ring disk voltamogram analysis to elucidate the optimum loading of catalysts for oxygen reduction reaction (ORR) in 0.1 M KOH electrolyte. In this study, the activity and stability of NCNT at elevated temperature were investigated. The current limiting plateau was achieved with loading above 500 μg/cm2 on glassy carbon tip with insignificant change in onset potential (c.a. +0.9 V vs RHE). The highest electron transfer number of 3.90 was obtained and it was found comparable to n = 3.95 on 130 μg/cm2 Pt/C catalysts. The subjection to cell's temperature from 298 K to 343 K showed improved activity and was found stable above 323 K.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalElectrochimica Acta
Volume129
DOIs
Publication statusPublished - 20 May 2014

Fingerprint

Carbon Nanotubes
Carbon nanotubes
ethylenediamine
Nitrogen
Oxygen
Catalysts
Glassy carbon
Temperature
Electrolytes
Chemical vapor deposition
Metals
Iron
Thin films
Electrons

Keywords

  • catalytic effect
  • metal-free catalyst
  • nitrogen-doped carbon nanotubes
  • oxygen reduction reaction

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Cite this

The impact of loading and temperature on the oxygen reduction reaction at nitrogen-doped carbon nanotubes in alkaline medium. / Wong, W. Y.; Wan Daud, Wan Ramli; Mohamad, Abu Bakar; Kadhum, Abdul Amir H.; Loh, Kee Shyuan; Herianto, Edy; Lim, Kean Long.

In: Electrochimica Acta, Vol. 129, 20.05.2014, p. 47-54.

Research output: Contribution to journalArticle

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AU - Wong, W. Y.

AU - Wan Daud, Wan Ramli

AU - Mohamad, Abu Bakar

AU - Kadhum, Abdul Amir H.

AU - Loh, Kee Shyuan

AU - Herianto, Edy

AU - Lim, Kean Long

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N2 - Metal-free nitrogen-doped carbon nanotube (NCNT) catalysts were synthesised via chemical vapour deposition with ethylenediamine and iron phthalocyanine. The electrochemically active NCNT was studied via thin-film rotating-ring disk voltamogram analysis to elucidate the optimum loading of catalysts for oxygen reduction reaction (ORR) in 0.1 M KOH electrolyte. In this study, the activity and stability of NCNT at elevated temperature were investigated. The current limiting plateau was achieved with loading above 500 μg/cm2 on glassy carbon tip with insignificant change in onset potential (c.a. +0.9 V vs RHE). The highest electron transfer number of 3.90 was obtained and it was found comparable to n = 3.95 on 130 μg/cm2 Pt/C catalysts. The subjection to cell's temperature from 298 K to 343 K showed improved activity and was found stable above 323 K.

AB - Metal-free nitrogen-doped carbon nanotube (NCNT) catalysts were synthesised via chemical vapour deposition with ethylenediamine and iron phthalocyanine. The electrochemically active NCNT was studied via thin-film rotating-ring disk voltamogram analysis to elucidate the optimum loading of catalysts for oxygen reduction reaction (ORR) in 0.1 M KOH electrolyte. In this study, the activity and stability of NCNT at elevated temperature were investigated. The current limiting plateau was achieved with loading above 500 μg/cm2 on glassy carbon tip with insignificant change in onset potential (c.a. +0.9 V vs RHE). The highest electron transfer number of 3.90 was obtained and it was found comparable to n = 3.95 on 130 μg/cm2 Pt/C catalysts. The subjection to cell's temperature from 298 K to 343 K showed improved activity and was found stable above 323 K.

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