Nitrogen doped Carbon Nanotubes as Electrocatalyst for Oxygen Reduction Reaction

Utsav Raj Dotel, Fatemeh Davodi, Olli Sorsa, Tanja Kallio, Tor Hemmingsen*

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

The oxygen reduction reaction on nitrogen doped multiwalled carbon nanotubes (N-MCNTs) is studied for its application for deoxygenation of seawater. N-MCNTs were synthesized using commercial MCNTs and polyaniline as nitrogen precursor and annealing at a high temperature. The ORR was studied on N-MCNTs in 0.5 M sodium chloride solution using a rotating disk electrode, and physical characterization of the electrocatalysts was performed using X-ray diffraction, mass spectroscopy and transmission electron microscope techniques. The material showed high activity for the ORR in the chloride electrolyte. The onset potential for N-MCNTs was 0.94 V vs RHE. Koutecky-Levich analysis showed that the electrons transfer mainly followed the four-electron pathway, and the electrocatalyst showed good stability during a 15-h stability test.

Original languageEnglish
Pages (from-to)10340-10351
Number of pages12
JournalInternational Journal of Electrochemical Science
Volume14
Issue number11
DOIs
Publication statusPublished - Nov 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Seawater
  • Deoxygenation
  • Oxygen reduction
  • Carbon nanotubes
  • MICROBIAL FUEL-CELLS
  • SILVER
  • CATALYSTS
  • CATHODE
  • ELECTRODES
  • ELECTROREDUCTION
  • SEAWATER
  • MEDIA
  • WATER
  • ACID

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