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Title
Challenges in hydrogen quantification using Kelvin probe technique at different levels of relative humidity
AuthorHassel, Achim Walter In der Gemeinsamen Normdatei der DNB nachschlagen ; Burgstaller, Wolfgang ; Schimo, Gabriela
Published in
Journal of Solid State Electrochemistry, 2017, Vol. 21, Issue 6, page 1785-1796
PublishedSpringer Berlin Heidelberg, 2017
LanguageEnglish
Document typeJournal Article
Keywords (EN)Kelvin probe / Hydrogen detection / Palladium / Diffusion / Permeation
ISSN1433-0768
URNurn:nbn:at:at-ubl:3-1628 Persistent Identifier (URN)
DOI10.1007/s10008-017-3541-3 
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 The work is publicly available
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Challenges in hydrogen quantification using Kelvin probe technique at different levels of relative humidity [2.08 mb]
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Abstract (English)

Kelvin probe-based contact potential measurements were conducted with in situ electrochemical hydrogen loading of a Pd membrane with a thickness of 100 m. The theoretical basis of diffusion coefficient calculation based on measured response time of potential drop, arising from hydrogen arriving at the detection side of the Pd membrane, was discussed. In situ hydrogen loading was also utilized for insertion of different amounts of hydrogen into the Pd sample while monitoring the resulting contact potential difference changes. Measurement of contact potential difference at different final values of hydrogen concentration in the Pd membrane was performed at various atmospheric conditions, focusing in this work on increasing relative humidity (4 to 85% rH). Moreover, the effect of humidity changes on hydrogen effusion kinetics at room temperature and low oxygen content (<1%) was studied.

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CC-BY-License (4.0)Creative Commons Attribution 4.0 International License