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

Katsutoshi Kobayashi; Hironori Nakajima; Takuya Goto; Yasuhiko Ito

doi:10.1149/1.1922891

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

Katsutoshi Kobayashi, Hironori Nakajima, Takuya Goto, Yasuhiko Ito

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Abstract

Nitrogen electrode reaction has been investigated in a LiCl-KCl-CsCl melt containing Li₃N. The following reaction, N^3- → 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, p_N2, of 0.1-1.0 atm and the anion fraction of N^3- ion, x_N3-, of 0.003-0.020 (anion fraction). Then the standard formal potential of N₂/N^3-, E_N2/N3-^0′, is evaluated to be 0.193 ± 0.003 V vs. Li⁺/Li (p_N2 = 1 atm,x_N3- = 1) at 673 K. The dependence of E_N2/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 language	English
Pages (from-to)	E207-E211
Journal	Journal of the Electrochemical Society
Volume	152
Issue number	7
DOIs	https://doi.org/10.1149/1.1922891
Publication status	Published - 2005
Externally published	Yes

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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10.1149/1.1922891

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@article{2c340f7454b64eaaad8380bafddd5ce5,

title = "Thermodynamic investigations of nitrogen electrode reaction in a LiCl-KCl-CsCl Melt",

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.",

author = "Katsutoshi Kobayashi and Hironori Nakajima and Takuya Goto and Yasuhiko Ito",

year = "2005",

doi = "10.1149/1.1922891",

language = "English",

volume = "152",

pages = "E207--E211",

journal = "Journal of the Electrochemical Society",

issn = "0013-4651",

publisher = "Electrochemical Society, Inc.",

number = "7",

}

TY - JOUR

T1 - Thermodynamic investigations of nitrogen electrode reaction in a LiCl-KCl-CsCl Melt

AU - Kobayashi, Katsutoshi

AU - Nakajima, Hironori

AU - Goto, Takuya

AU - Ito, Yasuhiko

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

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DO - 10.1149/1.1922891

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VL - 152

SP - E207-E211

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 7

ER -

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

Abstract

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