A rotating disk electrode study on the ammonia oxidation

Kazuki Endo, Yasushi Katayama, Takashi Miura

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52 Citations (Scopus)

Abstract

The anodic oxidation of ammonia in alkaline solutions was investigated by using rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) techniques. The ammonia oxidation current on the rotating platinum disk was confirmed not to increase but to decrease with increasing the rotation rate at 25-60 °C. The in situ ring electrode detector gave two kinds of signals for the electroactive species transported from the disk electrode engaged in ammonia oxidation; one can be again reduced and another can further be oxidized on Pt or Ni ring. These results suggested that at least some of the intermediates involved in ammonia oxidation on Pt may not be strongly adsorbed but be detached from the surface regions.

Original languageEnglish
Pages (from-to)2181-2185
Number of pages5
JournalElectrochimica Acta
Volume50
Issue number11
DOIs
Publication statusPublished - 2005 Apr 1

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Keywords

  • Ammonia oxidation
  • Intermediate
  • Ni-ring
  • Pt-disk
  • Rotating ring-disk electrode

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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