Browsing by Author "Chen, Ping"

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    De-hydrogenation/rehydrogenation properties and reaction mechanism of AmZn(NH2)n-2nLiH systems (A = Li, K, Na, and Rb)
    (2022) 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
    With the aim to find suitable hydrogen storage materials for stationary and mobile applications, multi-cation amide-based systems have attracted considerable attention, due to their unique hydrogenation kinetics. In this work, AmZn(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 AmZn(NH2)n-2nLiH (with m = 2, 4 and n = 4, 6), as well as Na2Zn(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, Rb2Zn(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.