Reduction of nitrite to ammonia on PEDOT-bipyridinium-Fe complex electrodes

Orawan Winther-Jensen, Bjorn Winther Jensen

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Various issues still exist for electrochemical nitrite reduction to ammonia especially the significant overpotential and the formation of unwanted side products. In this work, we aim to develop an electrochemical method to facilitate the ammonia production from nitrite under ambient conditions and low overpotentials. Poly(3,4-ethylenedioxythiophene)-5,5′-(dithiophen-2-yl)-2, 2′-bipyridine-Fe (PEDOT-BIPY-Fe) electrodes were prepared using a facile vapour phase polymerization method. In-situ electrochemical UV-vis results confirm the presence of the Fe complex in the electrode. The obtained electrodes show good charge transfer between the PEDOT and the Fe complex and was successfully used to reduce nitrite to ammonia. Ammonia was detected when the applied potential was only - 0.4 V (vs Ag/AgCl) and high yield was achieved when - 0.5 V (vs Ag/AgCl) or more negative potentials were applied.

Original languageEnglish
Pages (from-to)98-101
Number of pages4
JournalElectrochemistry Communications
Volume43
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Ammonia production
  • Bipyridinium-Fe complex
  • Nitrite reduction
  • PEDOT
  • PEDOT composites
  • Vapour phase polymerisation

ASJC Scopus subject areas

  • Electrochemistry

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