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Title: Electrochemical hydrogen absorbing behavior of Pd and Pd-Li alloys in a molten LiCl-KCl-LiH system

Abstract

Electrochemical hydrogen absorption and desorption into/from Pd and Pd-Li alloys were studied in a molten LiCl KCl-LiH system (5 mole percent LiH added) at 673 K. A cyclic voltammogram for a Pd electrode indicates that the current is largely due to a hydrogen-related reaction and partly due to a Li-related reaction. Pd spontaneously changes into PdLiH{sub x} merely by immersion into the molten LiCl-KCl-LiH system, because the anodic hydrogen absorption and the cathodic lithium deposition occur on the same surface. By chronopotentiometry, H/Pd ratios were estimated for Pd, Pd{sub 7}Li, Pd{sub 2}Li, and PdLi electrodes after hydrogen charging at 0.6 V for 0.5 h as 0.05, 0.08, 0.27, and 0.74, respectively. The results show that the hydrogen absorbing ability of the alloys increases as the Li concentration increases. These characteristics can be explained by the stronger interaction of Li-H than of Pd-H. For a D-T neutron generator, the development of new metal-tritide targets is important because the desorption of tritium caused by generated heat prevents high neutron output and long-time operation for conventional Ti-T targets.

Authors:
;  [1]
  1. Kyoto Univ. (Japan)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
533107
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 144; Journal Issue: 7; Other Information: PBD: Jul 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; PALLADIUM; PALLADIUM ALLOYS; LITHIUM ALLOYS; HYDRIDATION; NEUTRON GENERATORS; LITHIUM CHLORIDES; POTASSIUM CHLORIDES; LITHIUM HYDRIDES; MOLTEN SALTS; ELECTROCHEMICAL CORROSION

Citation Formats

Nohira, T, and Ito, Y. Electrochemical hydrogen absorbing behavior of Pd and Pd-Li alloys in a molten LiCl-KCl-LiH system. United States: N. p., 1997. Web. doi:10.1149/1.1837806.
Nohira, T, & Ito, Y. Electrochemical hydrogen absorbing behavior of Pd and Pd-Li alloys in a molten LiCl-KCl-LiH system. United States. https://doi.org/10.1149/1.1837806
Nohira, T, and Ito, Y. 1997. "Electrochemical hydrogen absorbing behavior of Pd and Pd-Li alloys in a molten LiCl-KCl-LiH system". United States. https://doi.org/10.1149/1.1837806.
@article{osti_533107,
title = {Electrochemical hydrogen absorbing behavior of Pd and Pd-Li alloys in a molten LiCl-KCl-LiH system},
author = {Nohira, T and Ito, Y},
abstractNote = {Electrochemical hydrogen absorption and desorption into/from Pd and Pd-Li alloys were studied in a molten LiCl KCl-LiH system (5 mole percent LiH added) at 673 K. A cyclic voltammogram for a Pd electrode indicates that the current is largely due to a hydrogen-related reaction and partly due to a Li-related reaction. Pd spontaneously changes into PdLiH{sub x} merely by immersion into the molten LiCl-KCl-LiH system, because the anodic hydrogen absorption and the cathodic lithium deposition occur on the same surface. By chronopotentiometry, H/Pd ratios were estimated for Pd, Pd{sub 7}Li, Pd{sub 2}Li, and PdLi electrodes after hydrogen charging at 0.6 V for 0.5 h as 0.05, 0.08, 0.27, and 0.74, respectively. The results show that the hydrogen absorbing ability of the alloys increases as the Li concentration increases. These characteristics can be explained by the stronger interaction of Li-H than of Pd-H. For a D-T neutron generator, the development of new metal-tritide targets is important because the desorption of tritium caused by generated heat prevents high neutron output and long-time operation for conventional Ti-T targets.},
doi = {10.1149/1.1837806},
url = {https://www.osti.gov/biblio/533107}, journal = {Journal of the Electrochemical Society},
number = 7,
volume = 144,
place = {United States},
year = {1997},
month = {7}
}