Desorption reaction in MgH2 studied with in situ μ+SR

In order to study the mechanism determining the desorption temperature (Td) of hydrogen storage materials, we have measured positive muon spin rotation and relaxation (μ+SR) in MgH2 over a wide temperature range including its Td. The pressure in the sample cell due to desorbed H2 was measured in par...

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Published inSustainable energy & fuels Vol. 3; no. 4; pp. 956 - 964
Main Authors Sugiyama, Jun, Umegaki, Izumi, Matsumoto, Mitsuru, Miwa, Kazutoshi, Nozaki, Hiroshi, Higuchi, Yuki, Noritake, Tatsuo, slund, Ola K, Månsson, Martin, Cottrell, Stephen P, Koda, Akihiro, Ansaldo, Eduardo J, Brewer, Jess H
Format Journal Article
LanguageEnglish
Published London Royal Society of Chemistry 2019
Subjects
Desorption
Hydrogen
Hydrogen storage materials
Muon spin relaxation
Muon spin rotation
Temperature
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Abstract In order to study the mechanism determining the desorption temperature (Td) of hydrogen storage materials, we have measured positive muon spin rotation and relaxation (μ+SR) in MgH2 over a wide temperature range including its Td. The pressure in the sample cell due to desorbed H2 was measured in parallel with the μ+SR measurements under static conditions. Such in situ μ+SR measurements revealed that hydrogen starts to diffuse in MgH2 well below Td. This indicates the important role of hydrogen diffusion in accelerating the desorption reaction by removing the reaction product, i.e. H2, from the reaction system.
AbstractList In order to study the mechanism determining the desorption temperature (Td) of hydrogen storage materials, we have measured positive muon spin rotation and relaxation (μ+SR) in MgH2 over a wide temperature range including its Td. The pressure in the sample cell due to desorbed H2 was measured in parallel with the μ+SR measurements under static conditions. Such in situ μ+SR measurements revealed that hydrogen starts to diffuse in MgH2 well below Td. This indicates the important role of hydrogen diffusion in accelerating the desorption reaction by removing the reaction product, i.e. H2, from the reaction system.
Author Brewer, Jess H
Månsson, Martin
slund, Ola K
Cottrell, Stephen P
Koda, Akihiro
Sugiyama, Jun
Higuchi, Yuki
Nozaki, Hiroshi
Miwa, Kazutoshi
Matsumoto, Mitsuru
Noritake, Tatsuo
Umegaki, Izumi
Ansaldo, Eduardo J
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SubjectTerms Desorption
Hydrogen
Hydrogen storage materials
Muon spin relaxation
Muon spin rotation
Temperature
Title Desorption reaction in MgH2 studied with in situ μ+SR
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