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In situ observation of lithium hydride hydrolysis by DRIFT spectroscopy

Awbery, R.P., Broughton, D.A. and Tsang, S.C. (2008) In situ observation of lithium hydride hydrolysis by DRIFT spectroscopy. Journal of Nuclear Materials, 373 (1-3). pp. 94-102. ISSN 0022-3115

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To link to this item DOI: 10.1016/j.jnucmat.2007.05.039

Abstract/Summary

Polycrystalline LiH was studied in situ using diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy to investigate the effect water vapour has on the rate of production of the corrosion products, particularly LiOH. The reaction rate of the formation of surface LiOH was monitored by measurement of the hydroxyl (OH) band at 3676 cm(-1). The initial hydrolysis rate of LiH exposed to water vapour at 50% relative humidity was found to be almost two times faster than LiH exposed to water vapour at 2% relative humidity. The hydrolysis rate was shown to be initially very rapid followed by a much slower, almost linear rate. The change in hydrolysis rate was attributed to the formation of a coherent layer of LiOH on the LiH surface. Exposure to lower levels of water vapour appeared to result in the formation of a more coherent corrosion product, resulting in effective passivation of the surface to further attack from water. Crown Copyright (c) 2007 Published by Elsevier B.V. All rights reserved.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:10978
Uncontrolled Keywords:REFLECTANCE INFRARED SPECTROMETRY, FOURIER-TRANSFORM SPECTROSCOPY, FUEL-CELL GENERATORS, HYDROGEN STORAGE, DIFFUSE, KINETICS, SPECTRA, LIH

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