Dissolution behavior of ammonia electrosynthesized in molten LiCl-KCl-CsCl system

Nobuyuki Serizawa, Hajime Miyashiro, Katsuhito Takei, Taro Ikezumi, Tokujiro Nishikiori, Yasuhiko Ito

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The dissolution behavior of ammonia (NH 3) in a molten LiCl-KCl-CsCl system was studied in order to determine the feasibility of low-energy NH 3 production via electrochemical synthesis in a high temperature molten salt system. In the presence of nitride ion (N 3-), a portion of NH 3 chemically dissolved in the melt as imide (NH 2-) and amide (NH 2 -) anions formed by the reaction between N 3- and NH 3. Although the dissolved NH 2 - anion thermally decomposed to form NH 3 and NH 2- anion, this phenomena may lower the yield of electrochemical NH 3 production. The dissolved NH 3 can be recovered by supplying hydrogen or water vapor to the melt. The anodic reaction between N 3- and H 2 to form NH 3 at a hydrogen gas-diffusion electrode was also examined and the NH 3 yield was estimated. Although the competing N 2 evolution reaction occurred at potentials more positive than 1.2 V vs. Li(I)Li, the conversion of Li 3N approached 70%, following the recovery processes.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume159
Issue number4
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Ammonia
Anions
Molten materials
ammonia
dissolving
Dissolution
Negative ions
anions
Hydrogen
diffusion electrodes
Imides
electrochemical synthesis
gaseous diffusion
Diffusion in gases
molten salts
supplying
imides
Steam
hydrogen
Amides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

Cite this

Dissolution behavior of ammonia electrosynthesized in molten LiCl-KCl-CsCl system. / Serizawa, Nobuyuki; Miyashiro, Hajime; Takei, Katsuhito; Ikezumi, Taro; Nishikiori, Tokujiro; Ito, Yasuhiko.

In: Journal of the Electrochemical Society, Vol. 159, No. 4, 2012.

Research output: Contribution to journalArticle

Serizawa, Nobuyuki ; Miyashiro, Hajime ; Takei, Katsuhito ; Ikezumi, Taro ; Nishikiori, Tokujiro ; Ito, Yasuhiko. / Dissolution behavior of ammonia electrosynthesized in molten LiCl-KCl-CsCl system. In: Journal of the Electrochemical Society. 2012 ; Vol. 159, No. 4.
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