De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb)

Cao, Hujun; Pistidda, Claudio; Richter, Theresia M.M.; Capurso, Giovanni; Milanese, Chiara; Tseng, Jo Chi; Shang, Yuanyuan; Niewa, Rainer; Chen, Ping; Klassen, Thomas; Dornheim, Martin

Abstract

With the aim to find suitable hydrogen storage materials for stationary and mobile applica-tions, multi-cation amide-based systems have attracted considerable attention, due to their unique hydrogenation kinetics. In this work, Am Zn(NH2)n (with A = Li, K, Na, and Rb) were synthesized via an ammonothermal method. The synthesized phases were mixed via ball milling with LiH to form the systems Am Zn(NH2)n-2nLiH (with m = 2, 4 and n = 4, 6), as well as Na2 Zn(NH2)4·0.5NH3-8LiH. The hydrogen storage properties of the obtained materials were investigated via a combination of calorimetric, spectroscopic, and diffraction methods. As a result of the performed analyses, Rb2 Zn(NH2)4-8LiH appears as the most appealing system. This composite, after de-hydrogenation, can be fully rehydrogenated within 30 s at a temperature between 190◦ C and 200◦ C under a pressure of 50 bar of hydrogen.

Citation

Cao, H., Pistidda, C., Richter, T. M., Capurso, G., Milanese, C., Tseng, J. C., Shang, Y., Niewa, R., Chen, P., Klassen, T., & Dornheim, M. (2022). De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb). Sustainability, 14(3), Article 1672. https://doi.org/10.3390/su14031672

• Journal Article Type: Article
• Acceptance Date: Jan 25, 2022
• Online Publication Date: Jan 31, 2022
• Publication Date: 2022-02
• Deposit Date: Aug 5, 2024
• Publicly Available Date: Aug 27, 2024
• Journal: Sustainability
• Electronic ISSN: 2071-1050
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 3
• Article Number: 1672
• DOI: https://doi.org/10.3390/su14031672
• Public URL: https://nottingham-repository.worktribe.com/output/34872235
• Publisher URL: https://www.mdpi.com/2071-1050/14/3/1672