Desorption reaction in MgH2 studied with in situ μ+SR. Issue 4 (14th February 2019)

• Record Type: Journal Article
• Authors: Sugiyama, Jun; Umegaki, Izumi; Matsumoto, Mitsuru; Miwa, Kazutoshi; Nozaki, Hiroshi; Higuchi, Yuki; Noritake, Tatsuo; Forslund, Ola K.; Månsson, Martin; Cottrell, Stephen P.; Koda, Akihiro; Ansaldo, Eduardo J.; Brewer, Jess H.
• Is Part Of: Sustainable energy & fuels. Volume 3:Issue 4(2019)
• Page Start: 956
• Page End: 964
• Publication Date: 2019-02-14
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c8se00568k
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : To study the mechanism determining the desorption temperature of hydrogen storage materials, we have measured muon spin rotation and relaxation (μ + SR) in MgH2 together with the pressure in the sample space. Abstract : In order to study the mechanism determining the desorption temperature ( T d ) of hydrogen storage materials, we have measured positive muon spin rotation and relaxation (μ + SR) in MgH2 over a wide temperature range including its T d . 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 T d . 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.