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• W2552226456 abstract "Alkali metal amide and imide systems especially NaNH2 and Li2NH have recently been proposed as a catalyst for NH3 cracking. This finding ignites the interest of researchers worldwide to study amide–imide/amide–hydride systems. Although these systems have shown catalytic properties toward NH3 cracking and have also been proposed as a hydrogen storage material, the decomposition mechanism of sodium amide is still unclear due to the complexity and low melting point of NaNH2. Herein, pure NaNH2 and its composite with lithium hydride as well as sodium hydride in a molar ratio 1:1 has been investigated, and a detailed mechanism associated with their decomposition has been suggested. The sodium amide–lithium hydride system is found to be analogous to lithium amide–sodium hydride. It desorbs 4 wt % H2 through cation exchange in a temperature range of 25–200 °C followed by NH3 mediated reaction in the temperature range 200–400 °C. The desorbed product can be rehydrogenated at around 200 °C under 2.0 MPa. An important intermediate, a double cation amide, i.e., Li3Na(NH2)4, is formed during the decomposition process. The mechanism for the formation of this double cation amide and successive H2 desorption is proposed herein. The two-peak mystery in the analogous LiNH2–NaH system remained unknown for almost a decade and is cracked herein during this study. We successfully propose our model based on NH3 mediated reaction for the decomposition of sodium amide–alkali hydride composite system." @default.
• W2552226456 created "2016-11-30" @default.
• W2552226456 creator A5023018637 @default.
• W2552226456 creator A5035303546 @default.
• W2552226456 creator A5080277395 @default.
• W2552226456 date "2016-12-06" @default.
• W2552226456 modified "2023-10-17" @default.
• W2552226456 title "Two-Peak Mystery of LiNH₂–NaH Dehydrogenation Is Solved? A Study of the Analogous Sodium Amide/Lithium Hydride System" @default.
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• W2552226456 doi "https://doi.org/10.1021/acs.jpcc.6b10611" @default.
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