Effects of metal-based additives on dehydrogenation process of 2NaBH4 + MgH2 system

Shang, Yuanyuan; Jin, Ou; Puszkiel, Julián Atillio; Karimi, Fahim; Dansirima, Palmarin; Sittiwet, Chongsutthamani; Utke, Rapee; Soontaranon, Siriwat; Le, Thi Thu; Gizer, Gökhan; Szabó, Dorothée Vinga; Wagner, Stefan; Kübel, Christian; Klassen, Thomas; Dornheim, Martin; Pundt, Astrid; Pistidda, Claudio

Abstract

We report a systematic investigation of the effect that selected metal-based additives have on the dehydrogenation properties of the reactive hydride composite (RHC) model system 2NaBH4+MgH2. Compared to the pristine system, the material doped with 3TiCl3·AlCl3 exhibits superior dehydrogenation kinetics. The addition of 3TiCl3·AlCl3 alters the controlling mechanism of the second dehydrogenation step making it change from a two-dimensional interface controlled process to a two-dimensional nucleation and growth controlled process. The microstructural investigation of the dehydrogenated 2NaBH4+MgH2 via high-resolution transmission electron microscopy (HRTEM) shows significant differences in the MgB2 morphology formed in the doped and undoped systems. The MgB2 has a needle-like structure in the sample doped with 3TiCl3·AlCl3, which is different from the plate-like MgB2 structure in the undoped sample. Moreover, nanostructured metal-based phases, such as TiB2/AlB2 particles, acting as heterogeneous nucleation sites for MgB2 are also identified for the sample doped with 3TiCl3·AlCl3.

Citation

Shang, Y., Jin, O., Puszkiel, J. A., Karimi, F., Dansirima, P., Sittiwet, C., Utke, R., Soontaranon, S., Le, T. T., Gizer, G., Szabó, D. V., Wagner, S., Kübel, C., Klassen, T., Dornheim, M., Pundt, A., & Pistidda, C. (2022). Effects of metal-based additives on dehydrogenation process of 2NaBH4 + MgH2 system. International Journal of Hydrogen Energy, 47(89), 37882-37894. https://doi.org/10.1016/J.IJHYDENE.2022.08.293

• Journal Article Type: Article
• Acceptance Date: Aug 30, 2022
• Online Publication Date: Sep 29, 2022
• Publication Date: Nov 1, 2022
• Deposit Date: Aug 5, 2024
• Journal: International Journal of Hydrogen Energy
• Print ISSN: 0360-3199
• Electronic ISSN: 1879-3487
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 47
• Issue: 89
• Pages: 37882-37894
• DOI: https://doi.org/10.1016/J.IJHYDENE.2022.08.293
• Keywords: Hydrogen storage, Borohydrides, Nucleation and growth, Kinetic modeling
• Public URL: https://nottingham-repository.worktribe.com/output/34872270
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0360319922040125?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Effects of metal-based additives on dehydrogenation process of 2NaBH4 + MgH2 system; Journal Title: International Journal of Hydrogen Energy; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijhydene.2022.08.293; Content Type: article; Copyright: © 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.