Thermodynamic investigations of nitrogen electrode reaction in a LiCl-KCl-CsCl Melt

Katsutoshi Kobayashi, Hironori Nakajima, Takuya Goto, Yasuhiko Ito

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4 Citations (Scopus)

Abstract

Nitrogen electrode reaction has been investigated in a LiCl-KCl-CsCl melt containing Li3N. The following reaction, N3- → 1/2N2 + 3e-, is confirmed by quantitative analysis of anodically evolved gas. The Nernst relation holds for the rest potential of Ni electrodes at nitrogen gas pressure, pN2, of 0.1-1.0 atm and the anion fraction of N3- ion, xN3-, of 0.003-0.020 (anion fraction). Then the standard formal potential of N2/N3-, EN2/N3-0′, is evaluated to be 0.193 ± 0.003 V vs. Li+/Li (pN2 = 1 atm,xN3- = 1) at 673 K. The dependence of EN2/N3-0′ upon the temperature (605-721 K) gives a linear relation, whose slope is (-0.790 ± 0.096) × 10-3 V K-1. Thermodynamic quantities for formation of Li3N in the melt are also estimated.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume152
Issue number7
DOIs
Publication statusPublished - Aug 22 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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