Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 43, Issue 27, Pages 12377-12385Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.04.180
Keywords
Porous material; Time-variant hydrogen concentration; Visualization technique
Categories
Funding
- Strategic International Collaborative Research Program (SICORP)
- Japan Science and Technology Agency (JST)
- Precursory Research for Embryonic Science and Technology (PRESTO), JST [JPMJPR13C1]
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An understanding of the mechanism whereby hydrogen is transported in porous materials is a key factor when developing hydrogen-utilizing equipment. For instance, studying the start-up and degradation characteristics of Polymer Electrolyte Fuel Cell (PEFC) requires the distribution of the time-variant hydrogen concentration to be measured at times of the order of 10(-1) s. However, few studies on time-variant hydrogen transport in porous materials have been reported, and conventional measuring methods are insufficient in terms of their time resolution. This study led to the development of a visualization technique using the characteristics of a MgNi thin film, the reflection rate of which changes along with the hydrogen concentration. The new visualization technique makes it possible to investigate and understand the distribution of the time-variant hydrogen concentration. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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