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Article Abstract

The hydrolysis of hydrides, represented by MgH, delivers substantial capacity and presents an appealing prospect for an on-site hydrogen supply. However, the sluggish hydrolysis kinetics and low hydrogen yield of MgH caused by the formation of a passivation Mg(OH) layer hinder its practical application. Herein, we present a dual strategy encompassing microstructural design and compounding, leading to the successful synthesis of a core-shell-like nanostructured MgH@Mg(BH) composite, which demonstrates excellent hydrolysis performance. Specifically, the optimal composite with a low of 9.05 kJ mol releases 2027.7 mL g H in 60 min, and its hydrolysis rate escalates to 1356.7 mL g min H during the first minute at room temperature. The nanocoating Mg(BH) plays a key role in enhancing the hydrolysis kinetics through the release of heat and the formation of local concentration of Mg field after its hydrolysis. This work offers an innovative concept for the design of hydrolysis materials.

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http://dx.doi.org/10.1021/acs.nanolett.4c00115DOI Listing

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